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Preheat oven to 350 degrees and spray a 9x13 baking dish
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In a small bowl, mix until combined the hot water and jello. Allow to cool to room temperature.
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Using a standing mixer, beat until combined the cake mix, 1/4 C jello, 1/4 C lemonade concentrate, water, oil and egg whites
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Pour batter into the baking dish and bake for 35-40 minutes or until a toothpick comes out clean
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Using the bottom of a wooden spoon or bamboo skewer, poke holes all over the cake
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Pour 3 tbsp of the jello into a squeeze bottle and set aside
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In a small bowl, whisk together 1 tbsp of the jello and 1/4 C of lemonade concentrate
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Pour the mixture over the cake, make sure the mixture gets into the holes.
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Allow to cool for 2 hours in the fridge
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In a large bowl, fold together the frosting and cool whip
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Frost over cake
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Using the squeeze bottle, pipe lines of the jello across the cake
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Using a butter knife, pull the knife through the lines to create zig-zags
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Top with raspberries and lemon peels
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Cut into slices and enjoy!