1 pkg (2-layer) yellow cake mix
1 pkg (4-serving size) Jell-O Pudding - pistachio flavor
1 cup water
1/4 cup oil
1/2 tsp peppermint extract
8 drops green food coloring
1 cup Baker's chocolate flavor baking chips, coarsely chopped
20 to 24 chocolate-covered thin mints
Combine cake mix, pudding mix, eggs water, oil, extract, and food coloring in a large mixer bowl. Blend on low speed then beat at medium speed for 4 minutes. Stir in the chips. Pour the mixture into the prepared pan and bake at 350 degrees 40 to 45 minutes until a wooden toothpick inserted in the center comes out clean.
Remove the cake from the oven and place the candies in a single layer over the top of the cake to cover completely. Return cake to the oven and bake an additional 3 minutes to melt the candies. Remove from oven and quickly spread candies evenly over the cake.