-
Preheat oven to 350°F
-
Prepare the insides of both cupcake pans with nonstick cooking spray
-
Combine cake mix, water, oil and eggs in a large bowl until combined, approximately 2 minutes
-
Fill outside with 3 tablespoons of batter and inside with 2 tablespoons of batter
-
Bake at 350°F for 19-23 minutes
-
Cool completely
-
Remove cupcakes from pan
-
Fill bottom with approximately 1 tablespoon of M&Ms
-
Pipe a layer of frosting on the bottom to secure it to the top
-
Frost cupcakes and decorate with sprinkles, if desired