24 (2 1⁄2-in.) cupcakes, baked in paper liners
1 can (16 oz) white or vanilla frosting
Gel food color
1. Divide frosting into two glass bowls; tint desired colors. Microwave 5 to 10 seconds at a time until pourable.
2. Spoon lighter color onto half of cupcake first, then darker color. Repeat with remaining cupcakes.
(You’ll need to reheat frosting occasionally.)