- 1 (4 ounce) bar white chocolate, chopped
- 1/4 cup butter
- 1/2 lime, zested
- 1 egg
- 1/3 cup white sugar
- 1 teaspoon vanilla extract
- 1 teaspoon fresh lime juice
- 2/3 cup all-purpose flour
- 1 tablespoon all-purpose flour
- Preheat oven to 350 degrees F (175 degrees C). Grease a 9×5-inch loaf pan.
- Combine white chocolate, butter, and lime zest in a saucepan over medium-low heat; cook and stir until completely melted, 5 to 10 minutes. Remove from heat.
- Beat egg in a bowl using an electric mixer until thickened and foamy; add white chocolate mixture, sugar, vanilla extract, and lime juice. Mix well. Fold 2/3 cup plus 1 tablespoon flour into mixture until batter is just mixed. Pour batter into the prepared pan.
- Bake in the preheated oven until a toothpick inserted in the center comes out clean, 15 to 25 minutes. Cool blondies before cutting into bars.