1 pkg. white cake mix (no pudding)
2 egg whites
1 c. plus 2 tbsp. water
5 tbsp. Creme De Menthe, divided
16 oz. can chocolate fudge frosting
8 oz. Cool Whip

Combine cake mix, egg whites, water and 3 tablespoons Creme De Menthe. Beat 2 minutes at high speed, then 1 minute at low speed. Place batter in a greased, floured 13 x 9 x 2 inch pan. Bake at 350 degrees for 25 to 35 minutes until done. Spread all of the frosting on cooled cake. Mix remaining Creme De Menthe (approximately 2 tablespoons) with the Cool Whip (thawed) and spread on top of the frosting. Chill 2 hours before serving.