Ingredients
Nonstick cooking spray
1 box white cake mix
1 c. water
1/3 c. Duke’s Mayonnaise
3 egg whites
Zest of 1 lime
1 c. (2 sticks) butter, softened
4 c. powdered sugar
1/4 c. tequila
3 tbsp. fresh lime juice
Zest of 1 lime
1 lime, halved and very thinly sliced, for garnish
1/2 tsp. salt
Preparation
Step 1Make cake: Preheat oven to 350° and line a 9”-x-13” metal pan with parchment paper leaving at least a two-inch overhang on the two long sides. Grease with cooking spray. In a large bowl, combine the cake mix, water, Duke’s Mayonnaise, egg whites, and lime zest and blend on medium-high until smooth, about 2 minutes. Pour into the prepared pan and bake, rotating the pan halfway through, until a toothpick inserted into the middle comes out clean, about 28 minutes. Let cool completely.Step 2Meanwhile, make frosting: In another large bowl, using a hand mixer, beat butter with half the powdered sugar until smooth. Add remaining powdered sugar, tequila, lime juice, and 1/2 teaspoon of salt, and beat until fluffy. Step 3Assemble the cake: Using the parchment overhang, remove cake from pan and place on a platter. Spread frosting evenly over the top. Top with lime slices and lime zest and serve.
