Step 1

Preheat the oven to 375 degrees F. Grease a 12-cup standard muffin pan with nonstick spray.

Step 2

In a medium bowl, stir together the flour, sugar, baking powder, and baking soda.

Step 3

In another bowl, stir together the peanut butter, milk, applesauce, eggs, and vanilla.

Step 4

Gently stir the flour mixture into the peanut butter mixture to make a uniform batter.

Step 5

Add your desired add-in. (You can also add 1 tablespoon of any add-in to each muffin cup, to make a batch with a few different flavors. Or you can bake them plain). Stir gently to combine.

Step 6

Divide batter among the prepared muffin tin, using a little over ¼ cup batter in each cup.

Step 7

Bake for 14-16 minutes, or until the edges are lightly golden brown and a cake tester inserted into the center comes out clean. Remove from oven, then transfer muffins to a wire rack to cool fully.