Creating these amazing Patriotic Funfetti Blondies can be straightforward if you follow these steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Line a 9×13-inch baking pan with parchment paper or grease it lightly.
2. Mix Butter and Sugars: In a large bowl, combine the melted butter, brown sugar, and granulated sugar. Mix well until smooth and creamy.
3. Add Eggs and Vanilla: Stir in the eggs, one at a time, followed by the vanilla extract. Make sure everything is well combined.
4. Combine Dry Ingredients: In a separate bowl, whisk together the flour, baking powder, baking soda, and salt.
5. Mix Wet and Dry Ingredients: Gradually add the dry ingredients to the wet mixture, stirring until just combined. Be careful not to overmix.
6. Fold in Sprinkles: Gently fold in the rainbow sprinkles, reserving a tablespoon for topping if desired.
7. Bake: Pour the batter into the prepared baking pan and spread it evenly. Sprinkle any reserved sprinkles on top. Bake in the preheated oven for 25-30 minutes or until the edges are lightly golden.
8. Cool: Once baked, remove the pan from the oven and let it cool in the pan for about 10-15 minutes. Transfer to a wire rack to cool completely before slicing.
9. Slice and Serve: Once cooled, slice the blondies into squares or rectangles.

These steps will guide you through creating these incredible blondies that are sure to impress.