Apple muffins with a protein boost

These tart Granny Smith muffins get their power from vanilla protein powder and Greek yogurt. Here’s how to make them: Preheat oven to 350 F and grease or line a 12-cup muffin tin. In a large bowl, mix together 1 c all-purpose flour, 1 c rolled oats, ½ c vanilla protein powder, ⅓ c packed brown sugar, 1½ tsp baking powder, ½ tsp baking soda, 1½ tsp cinnamon, 1½ tsp cinnamon, and ¼ tsp salt. In a medium bowl, whisk 2 large eggs, ¾ c Greek yogurt, ½ c unsweetened applesauce, 4 tbsp melted butter, and 2 tsp vanilla extract. Fold the wet ingredients into the dry ingredients until just combined. Fold in 2 peeled and diced Granny Smith apples and ½ c chopped walnuts. Divide batter between muffin cups. Bake until tops are golden and a toothpick inserted in the center comes out clean, 20 to 22 minutes. Let cool in the pan for 5 minutes, then transfer to a wire rack to cool completely.