Something magical happens when you combine the tart flavor of key lime with the delicate flavor of white chocolate. This key lime sheet cake lives up to expectations with the perfect mix of sweet and tart. It's so rich and moist, you'll want to reduce the standard serving size. If at all possible, use fresh key limes. If you cannot find fresh key limes, some companies sell bottled key lime juice. As a last resort, standard Persian limes may be used.
Prep Time: 15 minutes
Cook Time: 45 minutes
Ingredients:
- 1-3/4 cups all-purpose flour
- 2 teaspoons baking powder
- 1/2 teaspoon salt
- 6 tablespoons (3/4 stick) butter, softened
- 1 cup sugar
- 2 large eggs, lightly beaten
- 1-1/2 teaspoons grated key lime zest
- 1 tablespoon fresh key lime juice (see Note)
- 2/3 cup buttermilk
- 1 cup white chocolate chips
- Glaze:
- 1 cup powdered sugar
- 1/8 cup fresh key lime juice
- Additional powdered sugar (optional)
Preparation:
Preheat oven to 350 F. Line a 9 x 13-inch baking pan with non-stick foil or grease with butter liberally.Blend the flour, baking powder, and salt together in a small bowl. Set aside.
In a large mixing bowl, cream butter and sugar together with a mixer, beating until blended. Add the eggs, 1-1/2 teaspoons lime zest, and 1 tablespoon lime juice.
Into the butter-cream mixture in the large bowl, add one-third of the flour mixture, stirring until combined. Add one-third of the buttermilk, stirring until combined. Continue alternating one-third of each until all is mixed well. Fold in white chocolate chips.
Spread batter evenly in pan. Bake 40 to 45 minutes or until wooden pick inserted in center comes out clean. Let rest in pan about 5 minutes and then poke holes all over the top of the cake with a wooden pick. Spread Glaze (instructions below) evenly over top of cake and cool completely. Just before serving, cut into serving pieces, and sift powdered sugar over the top of the pieces. Serve immediately.
Glaze:
Whisk powdered sugar and 1/8 cup lime juice together until combined and smooth.
Note: Key limes are about the size of a golf ball and yellow when ripe. The flavor is a bit sweeter and less acidic than Persian limes. If you cannot find fresh key limes, some companies sell bottled key lime juice. As a last resort, standard Persian limes may be used.
Yield: 24 to 36 servings, depending on cut size
