Substitution for Dry Milk

I have this recipe:

[i]Blueberry Muffin

2 1/2 cups cake flour
1 1/2 cups all-purpose flour
2 1/2 cups sugar
1/2 cup powdered milk
1 teaspoon salt
4 teaspoons baking powder
1 cup canola oil
1 egg
1 1/2 cups water
2 to 3 cups blueberries[/i]

Can I substitute the 1 1/2 C water & 1/2 C Powdered Milk with just 1 1/2 C Milk? Or will that effect the texture of the muffin too much?