Cookie house:
3 batches dough from Diamond Cardamom Sparkle Cookies, recipe below
Tree royal icing:
2 lb. (907 g) powdered sugar
¾ cup meringue powder
All-purpose royal icing:
4 lb. (1.81 kg) powdered sugar, divided
1½ cup meringue powder, divided
Glaze:
2 lb. (907 g) powdered sugar
6 Tbsp. light corn syrup
10 Tbsp. fresh lemon juice or water
Teal gel food coloring (such as Americolor soft gel paste #110)
Teal sparkle mix:
¼ cup green pearlized sugar (such as Wilton Emerald Pearlized Sugar)
¼ cup blue pearlized sugar (such as Wilton Sapphire Pearlized Sugar)
Aquamarine sparkle mix:
1 Tbsp. light green chunky sugar (such as Layer Cake Shop Soft Green Chunky Sugar)
3 Tbsp. light blue chunky sugar (such as Layer Cake Shop Pearly Light Blue Chunky Sugar)
1 tsp. green pearlized sugar (such as Wilton Emerald Pearlized Sugar)
Celadon sparkle mix:
¾ cup light green chunky sugar (such as Layer Cake Shop Soft Green Chunky Sugar)
1 cup light blue chunky sugar (such as Layer Cake Shop Pearly Light Blue Chunky Sugar)
Assembly:
½ cup light blue chunky sugar (such as Layer Cake Shop Pearly Light Blue Chunky Sugar)
2 fairy light strands with batteries
4 mm gold dragées (for doorknobs and tree ornaments)
22 pieces green old-fashioned candy sticks
1 box Biscolata cream-filled milk chocolate wafer rolls
1 box sugar ice cream cones (minimum 8, plus extra in case of breakage)
1½ cups sliced almonds
1½ cups salted, roasted almonds, coarsely chopped
1 lb. pretzel rods (such as Utz’s old-fashioned pretzel rods; select the straightest pieces)
7 raw spaghetti strands
1 lb. (or more) desiccated shredded coconut
12" (⅛"-thick) red ribbon (optional)
Miniature bicycle (optional)
Special equipment:
1"-, 2"-, and 3"-diameter biscuit or cookie cutters; two 12" pastry bags, #234 piping tip, and #6 piping tip; an 18"-diameter pizza pan
Cookie house:
Print and read through Mid-Century Modern Cookie House Guide, which contains templates and step-by-step assembly instructions.
Working one at a time, roll out disks of chilled dough into ¼"-thick rectangles between a sheet of parchment paper and plastic used to wrap dough—this will eliminate the need for flouring. (In order to achieve a consistent thickness, try using ¼" bands around your rolling pin.) You should have six 8½x11" rectangles. Stack rectangles, keeping parchment and plastic wrap intact, on flexible cutting boards to keep them flat and save space. Chill dough in freezer at least 30 minutes and up to overnight.
Template pieces on pages 10–15 of the printout guide will be cut from the 6 pieces of prepared dough. Save all scraps, gathering and re-rolling between used (but clean) parchment and plastic wrap. Repeat process to cut pieces from the last template, page 16. Gather scraps one last time and re-roll dough, keep in the freezer in case you need to make a replacement piece. Remove plastic from dough.
Using scissors or an X-Acto knife and ruler, cut out template pieces, keeping each page’s pieces together. Arrange as many cut-out template pieces as will fit on each rectangle of dough, puzzling together as needed. The templates are meant to optimize this step. Working with one rectangle of dough at a time and chilling remaining dough in the freezer, carefully cut out shapes with a sharp chef’s or paring knife. For round items, use a 1"-, 2"-, or 3"-diameter biscuit or cookie cutter (jars in equivalent sizes will also work). Leave paper cutouts on each cookie to keep track of what’s what and transfer to a cutting board or baking sheet. Transfer to freezer and chill while you continue to cut out remaining pieces (stack as needed). Chill all dough in the freezer 20 minutes (leave templates on top).
Place racks in middle and lower half of oven; preheat to 325°F. Remove dough from freezer, remove templates, and gently peel away parchment underneath each piece, pulling gently down and away to avoid distorting shapes. Divide dough cutouts between 2 parchment-lined baking sheets, spacing about 1" apart. Place similarly sized items together to ensure even baking. Bake, rotating baking sheets top to bottom and front to back halfway through, until edges are golden brown, 15–17 minutes for small pieces, 20–25 for medium pieces, 25–30 minutes for large pieces. Watch carefully to avoid overbaking or underbaking; a firm but not overly browned cookie is ideal for constructing house.
As soon as each baking sheet is removed from oven, lay each template pattern piece on its coordinating cookie again and trim as needed with a sharp knife to get clean edges. If the cookies cool too much they will crack when trimmed. If you need to trim a cold cookie, pop it back in the oven for a few minutes to warm it up, or microwave in 10-second intervals to soften. Transfer cookies to wire racks and let cool.
Tree royal icing:
Mix powdered sugar and meringue powder in the bowl of a stand mixer fitted with paddle attachment on low speed, adding 1 Tbsp. water at a time up to ⅔ cup and incorporating completely and scraping down sides of bowl before adding more, until the consistency of pourable cement. Continue to beat until sugar is fully hydrated and stiff peaks form, about 5 minutes.
Fill a pastry bag fitted with #234 tip with about 1 cup of royal icing (a small portion makes it easier to pipe and control the royal icing) and close with a rubber pastry bag tie or kitchen twine. Transfer remaining icing to an airtight container. Cover with plastic wrap, pressing directly against surface to remove most air bubbles. Cover with lid, label as royal icing for trees, and chill.
All-purpose royal icing:
Working in 2 batches to avoid overwhelming your mixer, beat 2 lb. powdered sugar and ¾ cup meringue powder in the bowl of a stand mixer fitted with the paddle attachment, adding 1 Tbsp. water at a time up to 14 Tbsp. and incorporating completely and scraping down sides of bowl before adding more, until the consistency of thick batter and soft peaks form. (Icing should flow easily but keep its shape. If the formula is too dry, the components may not adhere well.)
Fill a pastry bag fitted with a #6 piping tip with about 1 cup icing and close with a rubber pastry bag tie or kitchen twine. Transfer 2 cups icing to an airtight container, cover, and label icicles. Wrap well to prevent drying out since this will be applied near the end of construction. Transfer remaining icing to another airtight container and cover with plastic wrap, pressing directly against surface. Cover with lid, label as all-purpose royal icing, and chill. (You can top off this container with second batch of icing.)
Make second batch of icing with remaining 2 lb. powdered sugar and ¾ cup meringue powder and transfer to airtight containers and label as you did with the first batch.
Glaze:
Whisk powdered sugar and corn syrup in a medium bowl, adding 1 Tbsp. lemon juice at a time, until combined. Glaze should be thick but pourable (you can thin with a bit of water if needed). Transfer 1 Tbsp. glaze to a ramekin or small bowl. Barely dip the tip of a toothpick into food coloring and mix into glaze in ramekin. Dip a fresh toothpick into ramekin with teal glaze and add to glaze in bowl; mix well to tint. Repeat process, gradually adding color until you have a soft shade of celadon. This technique is helpful when you want to create pale, subtle colors and prevents oversaturation of the entire quantity of glaze.
Diamond Cardamom Sparkle Cookies
1½ cups (300 g) granulated sugar
1 cup (2 sticks) unsalted butter, room temperature
1 large egg, room temperature
Zest of 1 lemon
2¼ cups (281 g) all-purpose flour
½ tsp. ground cinnamon
¼ tsp. freshly grated nutmeg
2 tsp. green cardamom seeds (crack pods and remove seeds if needed)
1 tsp. black peppercorns
½ tsp. kosher salt
Glaze and assembly:
1 lb. (453 g) powdered sugar
3 Tbsp. light corn syrup
5 Tbsp. fresh lemon juice
Teal gel food coloring (such as AmeriColor soft gel paste #110)
¼ cup salted roasted almonds, coarsely chopped
Edible gold metallic paint, well shaken (optional)
Teal chunky sugar (such as Layer Cake Shop Teal Chunky Sugar; for decorating)
Light blue chunky sugar (such as Layer Cake Shop Light Blue Chunky Sugar; for decorating)
Special equipment:
A 3½" diamond cookie cutter (optional)
Dough:
Beat granulated sugar and butter in the bowl of a stand mixer fitted with a paddle attachment on medium speed until pale and fluffy, about 5 minutes. Beat in egg and lemon zest, scraping down bowl with a rubber spatula as needed.
Sift flour, cinnamon, and nutmeg into a medium bowl. Pulse cardamom and peppercorns in a spice mill or grind in a mortar and pestle until the consistency of coarsely ground coffee—be careful not to grind too finely. (Alternatively, you can wrap in a kitchen towel and pound with a rolling pin.) Whisk cardamom, pepper, and salt into dry ingredients. With mixer on medium-low speed, gradually add to stand mixer bowl in 2–3 additions, scraping down sides and bottom of bowl between additions; beat just until combined, about 1 minute (be careful not to overmix).
Divide dough in half and flatten each into a 4½"-wide square, about 1" thick. Wrap each square tightly in plastic and chill at least 1 hour before using.
Glaze and assembly:
Let dough sit at room temperature 20 minutes. Place 1 square of dough on a large sheet of parchment paper; unwrap and arrange plastic wrap over dough to prevent sticking (and eliminate the need for flouring). Roll out to ¼" thick and chill in the freezer until firm, at least 30 minutes.
Remove and reserve plastic wrap. Punch out cookies with cutter and transfer right away, while dough is still cold, to a parchment-lined flexible cutting board or parchment-lined baking sheet, arranging in a single layer and placing close together for efficiency. Stack, layering with sheets of parchment in between, if needed. Freeze all pieces until ready to bake, at least 15 minutes. Well-wrapped cookies can be frozen up to 1 week. (If you do not have a diamond cookie cutter, you can roll the dough out to a ¼"-thick square and cut dough into 2"-wide strips. Cut strips on a 60° angle 2" apart to create diamonds.)
Meanwhile, pat together scraps and roll out between leftover parchment paper and reserved plastic wrap. Repeat entire process with remaining square of dough.
Place racks in middle and lower third of oven; preheat to 325°F. Arrange 9 frozen cookies each on 2 parchment-lined baking sheets, spacing about 1" apart. Bake cookies, rotating baking sheets front to back and top to bottom halfway through, until edges are barely golden, about 15 minutes. Let cool 5 minutes, then transfer to a wire rack and let cool completely. They should be crisp but chewy. Bake remaining cookies. (If you’d like sharp defined edges and are serving cookies the same day, trim them as soon as they come out of the oven. Don’t trim if you aren’t eating them directly. They will harden faster.)
While the cookies are cooling, whisk powdered sugar and corn syrup in a medium bowl, adding 1 Tbsp. lemon juice at a time, until combined. Glaze should be thick but pourable (you can thin with a bit of water if needed). Transfer 1 Tbsp. glaze to a ramekin or small bowl. Barely dip the tip of a toothpick into food coloring and mix into glaze in ramekin. Dip a fresh toothpick into ramekin with teal glaze and add to glaze in bowl; mix well to tint. Repeat process, gradually adding color until you have a soft shade of celadon. This technique is helpful when you want to create pale, subtle colors and will prevent you from oversaturating the entire quantity of glaze.
Combine almonds and a few drops of edible gold paint (if using) in a small bowl and toss until almonds are well coated. Spread out on a plate and let dry, about 15 minutes.
Using a small offset spatula or spoon, add a dollop of glaze on to one side of a cookie. Spread a thin layer of glaze over half of the cookie, making a straight edge along the center for a graphic look. Wipe off any excess glaze and clean up edges with your finger (keep a damp kitchen towel nearby to keep fingers clean). Transfer to a wire rack set inside a rimmed baking sheet. Sprinkle gold almonds and chunky sugars over glaze (you want to do this while it is still wet). Repeat with remaining cookies, changing the direction or even the geometric shape of the glazed area if desired. Let cookies sit until glaze is set before serving, about 3 hours. Drying time may vary depending on how thick your glaze is and the humidity.