01 -
Preheat oven to 350°F and line a muffin tin with liners.
02 -
In a bowl, whisk together water, applesauce, oil, vanilla, and vinegar; let sit for 10 minutes.
03 -
In another bowl, sift together flour, sugar, cocoa, salt, and baking soda. Add the dry mixture to the wet mixture and mix until smooth.
04 -
Fill cupcake liners about 2/3 full. Bake for 20 minutes or until a toothpick inserted into the center comes out mostly clean.
05 -
Once cooled, use a piping bag or spoon to add rainbow filling to the center of each cupcake.
06 -
Top with melted chocolate, frosting, or sprinkles as desired.