1-First Step: Preheat and Prepare Your Pan: Start by preheating your oven to 350°F and lining a 9×9-inch baking pan with parchment paper. This step sets the stage for even baking and makes it easy to remove the bars later. I always double-check my oven temperature because getting it right means your bars won’t burn or undercook.

2-Second Step: Mix the Cookie Bar Dough: In a mixing bowl, beat 1 stick (1/2 cup) of softened salted butter and 1 cup of sugar until they’re fluffy and light. This usually takes about 2-3 minutes with an electric mixer. Then, beat in 1 large egg and 1 teaspoon of vanilla extract until everything is well combined. Gradually add 2 cups of all-purpose flour (measured without packing) and 1 teaspoon of baking powder, mixing on low speed until a thick dough forms. Gently stir in 1/4 cup of festive sprinkles by hand to keep them from breaking apart.

3-Third Step: Bake the Bars: Spread the batter evenly into your prepared pan, making sure it’s smooth on top for even cooking. Pop it into the preheated oven and bake for 20 minutes, or until the edges are golden brown. Keep an eye on it around the 15-minute mark, as ovens can vary, and you want that perfect chewy center.

4-Fourth Step: Cool the Bars: Once baked, let the bars cool completely in the pan on a wire rack. This might take 20-30 minutes, but don’t rush it cooling helps them set and makes frosting easier. After they’re cool, use the parchment paper edges to lift the entire bar out of the pan for clean cutting.

5-Fifth Step: Prepare the Frosting: In another bowl, blend 2 cups of powdered sugar, 1 stick (1/2 cup) of softened salted butter, 3 tablespoons of softened cream cheese, 1 teaspoon of vanilla extract, and 2 tablespoons of milk until smooth and creamy. This should take about 1-2 minutes of mixing. If it seems too thick, add a tiny bit more milk, but go slow to keep it perfect for spreading.

6-Sixth Step: Frost and Decorate: Spread the frosting generously over the cooled bars, making sure to cover them evenly. Top with additional sprinkles for that extra festive look. Let the frosting set for about 10 minutes if you want a firmer texture, or slice right away for a softer treat.

7-Final Step: Serve and Enjoy: Cut the bars into squares about 9 servings from a 9×9-inch pan and serve them up. They’re best enjoyed fresh, perhaps with a cup of hot cocoa or a slice of homemade banana bread for a full holiday spread. Remember, these bars store well, so you can make them ahead for parties or gifts. For more baking inspiration, check out this external resource on best Christmas cookie recipes.