Stir together apple sauce and cake mix in a large bowl until combined. Spray muffin tins with cooking spray and then evenly add batter to the muffin cups filling each 2/3 full.
Bake at 350F for 16 – 17 minutes or until they’re golden brown a wooden pick inserted in the center of the cupcake comes out clean. Cool the cupcakes on a baking rack. Once cool, decorate with optional spreads and sprinkles. Store in an airtight container for up to 3 days.