- Ready-made cake mix in a box, like the ubiquitous Betty Crocker kind.
- Food coloring.
- Water or milk.
Step two: Add food coloring. For layers, just parcel out the batter into small bowls, mix several drops of color to each bowl, and then just layer them in your microwave-safe cake-preparation container. If the batter is thick enough the layers will stay neatly separated.
Step three: Microwave. Time: usually at least a few minutes. Check by inserting knife; the cake is done when the knife comes out clean.
Hints: Cake rises. Use a larger dish than I did. There is a glass dish hidden inside this cake.
Pretty pretty colors. Of course now my hands are stained again. If it isn't oil paints then it is hair dye; if it isn't hair dye then it is food coloring.
Flourishes: add pieces of apple to the batter, or banana slices, or chocolate. Serve with a cold glass of milk.
Inspired by the rainbow-cake endeavors of my friend Dani. Her blog is here: http://lovingsweets.wordpress.com/