Creating 4th Of July Sugar Cookie Bars is easy when you follow these simple steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking pan or line it with parchment paper for easy removal.
2. Mix Dry Ingredients: In a large bowl, whisk together the flour, baking powder, and salt until well combined.
3. Cream Butter and Sugar: In another bowl, cream together the softened butter and granulated sugar until light and fluffy.
4. Add Eggs and Vanilla: Beat in the eggs, one at a time, followed by the vanilla extract, mixing until smooth.
5. Combine Mixtures: Gradually add the dry ingredients to the wet ingredients, stirring until just combined. Be careful not to overmix.
6. Spread Batter: Pour the cookie dough into the prepared baking pan and spread it evenly using a spatula.
7. Bake: Place the pan in the preheated oven and bake for 20-25 minutes, or until the edges are lightly golden and a toothpick inserted in the center comes out clean.
8. Cool: Remove from the oven and allow the cookie bars to cool in the pan for about 30 minutes.
9. Prepare Frosting: In a small bowl, whisk together the powdered sugar and milk until smooth and creamy. Adjust consistency if needed by adding more milk or powdered sugar.
10. Frost the Bars: Once the cookie bars are completely cool, spread the frosting evenly over the top.
11. Decorate: Sprinkle the red, white, and blue sprinkles over the frosted cookie bars for a festive touch.
12. Slice: Cut into squares or rectangles for serving.

By following these steps, you’ll have beautiful and delicious 4th Of July Sugar Cookie Bars ready to delight your family and friends!