1-First Step: Preheat and Prep Heat your oven to 350°F. Grease an 8×8-inch baking pan or line it with parchment paper for easy release. This setup ensures your easy blondies lift cleanly every time. For gluten-free adaptations, the parchment prevents sticking.

2-Second Step: Melt the Butter Melt ½ cup butter in a microwave-safe bowl or on the stovetop over low heat. Let it cool slightly to avoid cooking the egg later. This step builds the base flavor for chewy blondie bars. Vegan swap: Use coconut oil here for plant-based blondies.

3-Third Step: Mix Wet Ingredients Stir 1 cup brown sugar into the melted butter until smooth. Beat in 1 egg and 1 tsp vanilla extract. The mixture should look glossy and thick. This creates the caramel essence that defines homemade blondie bars. For low-calorie, add a splash of applesauce.

4-Fourth Step: Combine Dry Ingredients In a separate bowl, whisk 1 cup flour, ½ tsp baking powder, and ¼ tsp salt. Fold the dry mix into the wet until just combined, no dry streaks. Stir in ½ cup chopped walnuts or chips gently. Overmixing toughens blondie bars, so keep it light. Gluten-free flour works perfectly here.

5-Fifth Step: Spread and Bake Pour batter into the prepared pan and spread evenly with a spatula. Bake at 350°F for 25-30 minutes. Edges turn golden, and a toothpick inserted in the center comes out with moist crumbs. Avoid overbaking for that signature chewy texture in your blondie bars recipe.

6-Sixth Step: Cool and Cut Let the pan cool on a wire rack for 1 hour. This sets the bars for clean slices. Lift out using parchment, then cut into 16 squares. Store as directed below. These easy chewy blondie bars taste even better on day two.