1-Step 1: Prepare Your Equipment and Oven Preheat your oven to 350°F (175°C). This temperature ensures even baking without drying out the bars. While the oven heats, prepare your pan properly. Grease a 9×13-inch baking pan with cooking spray or butter. For foolproof release, line the pan with parchment paper, leaving overhanging edges that act as handles. This technique, often called “creating a sling,” makes removing the entire slab of bars effortless after cooling. Lightly grease the parchment paper as well. This extra step prevents any sticking along the edges. Having everything ready before mixing ensures you can work quickly once the wet and dry ingredients combine.

2-Step 2: Mix the Dry Ingredients In a large mixing bowl, whisk together the dry ingredients until thoroughly combined: Whisking serves two purposes: it aerates the flour for a lighter texture and evenly distributes the cocoa powder throughout. Any streaks of cocoa will become dark spots in your finished bars, so take time to blend completely. Set this bowl aside while you prepare the wet ingredients. Proper ingredient preparation is essential for making red velvet cookie bars with uniform color and consistent texture.

3-Step 3: Combine the Wet Ingredients In a separate bowl or large measuring cup, whisk together all wet ingredients: Whisk until the eggs are completely broken down and the food coloring is evenly distributed. The mixture should be a uniform deep pink or light red color. If using gel coloring, you may need to whisk slightly longer to dissolve any concentrated bits. Room temperature ingredients blend more smoothly and create a more even batter. If your eggs are cold from the refrigerator, place them in warm water for 5 minutes before cracking.

4-Step 4: Create the Batter Pour the wet mixture into the dry ingredients. Using a spatula or wooden spoon, gently fold the ingredients together until just combined. The keyword here is “just” overmixing develops gluten and results in tough, dense bars. Stop mixing as soon as no dry flour streaks remain. Small lumps in the batter are perfectly fine and will disappear during baking. The batter should be smooth, glossy, and a vibrant red color. For the best red velvet bars with cream cheese frosting, work efficiently once the batter comes together. The leavening action begins as soon as wet meets dry.

5-Step 5: Bake the Bars Transfer the batter to your prepared pan. Spread it evenly to all corners using your spatula, working from the center outward. Tap the pan gently on the counter twice to release any trapped air bubbles. Bake at 350°F for 25-30 minutes. Begin checking at the 25-minute mark by inserting a toothpick into the center. It should come out clean or with just a few moist crumbs attached. If wet batter clings to the toothpick, continue baking in 2-minute increments. The edges will pull slightly away from the pan sides when done, and the top will spring back when lightly touched. Avoid overbaking, as the bars continue cooking slightly after removal from the oven.

6-Step 6: Cool Completely Allow the bars to cool in the pan for 10 minutes. Then, using the parchment paper handles, lift the entire slab onto a wire rack to cool completely. This step is crucial even slightly warm bars will melt the frosting and create a mess. Full cooling typically takes 45-60 minutes. You can speed this process by placing the rack in the refrigerator after the first 20 minutes of room-temperature cooling.

7-Step 7: Prepare the Cream Cheese Frosting While the bars cool, make your frosting. In a medium bowl, beat together: Beat on medium speed for 2-3 minutes until completely smooth and creamy. Scrape down the bowl sides halfway through to ensure even mixing. Gradually add 2 cups powdered sugar, beating on low speed until incorporated. Increase to medium-high speed and beat for another 2 minutes until fluffy. Add 1 teaspoon vanilla extract and beat for 30 seconds more. The frosting should be spreadable but thick enough to hold its shape. If too thin, add more powdered sugar 1 tablespoon at a time. If too thick, add milk 1 teaspoon at a time.

8-Step 8: Frost and Serve Once the bars are completely cool, spread the frosting evenly over the surface. Work from the center outward, creating smooth strokes with your spatula or the back of a spoon. For a professional touch, create decorative swirls using the tip of your spatula. Or top with red velvet crumbs, white chocolate chips, or a dusting of cocoa powder for visual appeal. Cut into 24 squares using a sharp knife. Wipe the blade clean between cuts for neat edges. Serve immediately or refrigerate until needed.