1 white cake mix
1 cup sour cream
1 tsp vanilla
1/2 cup oil
yellow and orange food coloring gel (I found mine at Wal-Mart)
Preheat oven to 350. Mix all ingredients and blend for 1 minute. Scrape down the sides and mix on high for 2 minutes. Divide your batter in half and color. Below are the pictures of the colors.