Creating Key Lime Pie Bars – Browned Butter Blondie is a straightforward process. Follow these steps for a successful bake:

1. Preheat Your Oven: Preheat your oven to 350°F (175°C) and line a 9×9-inch baking pan with parchment paper.

2. Brown the Butter: In a medium saucepan over medium heat, melt the unsalted butter. Continue cooking, stirring frequently, until it turns golden brown and has a nutty aroma. Be careful not to burn it.

3. Mix Butter and Sugar: In a large mixing bowl, combine the browned butter and packed brown sugar. Stir until well blended.

4. Add Eggs and Vanilla: Beat in the eggs one at a time, and add the vanilla extract, stirring until fully combined.

5. Combine Dry Ingredients: In another bowl, whisk together the all-purpose flour and baking powder.

6. Incorporate Dry Ingredients: Gradually fold the dry mixture into the wet mixture until just combined. Be careful not to overmix.

7. Add Key Lime Juice: Pour in the key lime juice and gently mix until evenly distributed throughout the batter.

8. Transfer to the Pan: Spread the batter evenly into the prepared baking pan.

9. Bake: Place in the preheated oven and bake for 30-35 minutes or until a toothpick comes out clean.

10. Cool and Chill: Once baked, remove from the oven and allow it to cool in the pan for about 15 minutes. Then transfer to the refrigerator for at least 30 minutes to set.