1-First Step: Preheat your oven to 350°F and grease a 9×13-inch baking pan with butter or non-stick spray. Line with parchment for easy removal if you like. Gather all ingredients at room temperature for smooth mixing this prevents lumps and ensures even baking.

2-Second Step: In a large bowl, use an electric mixer to cream together ½ cup softened butter, 4 oz softened cream cheese, and 1 cup sugar. Beat on medium speed for 2-3 minutes until light and fluffy. This step aerates the mixture for tenderness.

3-Third Step: Add 1 egg and 1 tsp vanilla extract. Mix until fully combined, scraping down sides. The egg adds moisture and lift.

4-Fourth Step: In a separate bowl, whisk 2 cups flour, ½ tsp baking powder, and ¼ tsp salt. Gradually add dry ingredients to wet, mixing on low speed just until a soft dough forms. Avoid overmixing to keep bars soft.

5-Fifth Step: Spread dough evenly into the prepared pan using a spatula or wet hands. It will be sticky but smooths out. Bake for 18-22 minutes, until edges are lightly golden and center springs back lightly. Do not overbake for maximum softness.

6-Sixth Step: Remove from oven and cool completely in the pan on a wire rack, about 1-2 hours. Frosting on warm bars causes melting.

7-Seventh Step: For frosting, beat ½ cup softened butter until creamy. Gradually add 2 cups powdered sugar, 1 tsp vanilla, and 2-3 tbsp milk. Beat on high for 2 minutes until fluffy. Add a drop of pink food coloring for classic copycat lofthouse cookie bars look.

8-Eighth Step: Spread frosting evenly over cooled bars. Add sprinkles immediately if using. Chill in fridge for 30 minutes to set.

9-Final Step: Cut into 24 squares using a sharp knife. Serve at room temperature for best texture. Store as noted below. Total time: 45 minutes active + cooling. These easy sugar cookie bars recipe yields crowd-pleasing results every time.