Ok, I made these last week and the cream cheese frosting was a disaster. This worked out pretty good.

Margarita Cheesecake Bars
18 1/4 ounces lemon cake mix
2 egg whites
1 c. water
½ c. unsweetened applesauce
3 c. mini marshmallows
2 oz light cream cheese
.3 oz package sugar free lime jello
1 TB Tequila 1 lime — sliced for garnish (optional)

Heat oven to 350°F. Line a 13 x 9-in. baking pan with foil, letting foil extend about 2 in. above pan at both ends. Coat foil with nonstick spray. Combine cake mix with egg whites, water and applesauce. Spread cake batter in prepared pan. Bake for 35 minutes or until tooth pick poked in center comes out clean. Cool completely in pan on a wire rack. Heat marshmallows and cream cheese in microwave for 30 seconds; combine and add jello powder and Tequila. Spread evenly over cake. Refrigerate until ready to serve. To garnish: With citrus zester, cut peel off lime. Cut lime in quarters lengthwise then crosswise in 11 slices. Top bars with lime and peel. Yield: 24 bars. Per bar= 118 Calories; 3g Fat (21.2% calories from fat); 2g Protein; 21g Carbohydrate; trace Dietary Fiber; 1mg Cholesterol; 171mg Sodium. Exchanges: 0 Lean Meat; 0 Fruit; 1/2 Fat; 1 1/2 Other Carbohydrates.