1-Start by preheating your oven to 350°F (175°C) and greasing a 9-by-13-inch baking dish to get things ready. In a large bowl, whisk together 1 3/4 cups flour, baking powder, salt, and shredded coconut until well blended. In another bowl, beat the 3/4 cup unsalted butter and 1 cup sugar until light and fluffy, then add the 3 large eggs one at a time.

2-Next, alternate mixing in the flour mixture and 3/4 cup buttermilk, stirring gently to combine. Fold in 2 teaspoons finely grated lime zest and 2 tablespoons lime juice for that zesty kick. Pour the batter into your prepared dish and set it aside.

3-In a separate bowl, toss 1 tablespoon flour, 1 tablespoon sugar, 3 cups mixed berries, and 3 tablespoons lime juice together before scattering them over the batter. Bake for 35 to 40 minutes until the edges turn golden and a toothpick inserted in the center comes out clean. Let the cake cool in the pan before cutting it into squares for the best results.