INGREDIENTS
Cupcakes:
1/2 cup
granulated sugar
1/2 cup
packed brown sugar
6 tbsp
butter, softened
3
large eggs
1 tsp
vanilla extract
8 oz
cake flour (about 2 cups)
1/2 tsp
baking soda
1/4 tsp
salt
1/4 tsp
ground cinnamon
1/2 cup
buttermilk
1/3 cup
plus 2 tablespoons walnuts, toasted, chopped, and divided
Frosting:
1/2 tsp
cream of tartar
3
large egg whites
3/4 cup
maple sugar or granulated sugar
1/4 cup
water
salt