Kitty Litter Cake

Ingredients

• ✓ 1 (18.25 ounce) package German chocolate cake mix
• ✓ 1 (18.25 ounce) package white cake mix
• ✓ 2 (3.5 ounce) packages instant vanilla pudding mix
• ✓ 1 (12 ounce) package vanilla sandwich cookies
• ✓ 3 drops green food coloring
• ✓ 1 (12 ounce) package tootsie rolls