The “secret ingredient” in these coconut-infused blueberry cupcakes--mashed potatoes--gives the cake great texture, almost like pound cake. The fluffy frosting is just fun. Because it's low in calories and fat, you can spread or pipe a generous amount on top of each cupcake to make them look extra festive. The frosting stiffens as it stands, so be sure to put it on the cupcakes right after you make it.
Make Ahead Tip: Store unfrosted cupcakes airtight at room temperature for up to 1 day.
Equipment: Muffin tin with 12 (1/2-cup) cups, paper liners
Ingredient Notes: Look for whole-wheat pastry flour in the natural-foods section of large supermarkets and natural-foods stores. Store in the freezer.
Pasteurized dried egg whites are a wise choice in recipes that call for uncooked egg whites. Look for brands like Just Whites in the baking or natural-foods section of most supermarkets.
Tips: No buttermilk? You can make “sour milk” as a substitute: mix 1 1/2 teaspoons lemon juice or vinegar to 1/2 cup nonfat milk.
To improvise a double boiler, bring 2 inches of water to a simmer in a large saucepan, set a medium or large metal bowl over the simmering water. Allow at least an inch between the water and the bottom of the bowl.
DIY Muffin Cups: Make your next batch of muffins or cupcakes the ultimate grab-and-go treat by lining your tin with muffin liners. No liners? No problem. Use 5-inch squares of parchment paper, coat each muffin cup with cooking spray, and push each square into the cups using a small can or bottle, pressing the paper up the sides. (It's OK if some of the paper is sticking out over the rim.) Fill each cup as directed.
3 other carbohydrate, 1 fat