Sheet Pan Dessert for a Crowd with Easy Cleanup – Simple, Big-Batch Sweet Treat

This dessert hits that sweet spot between low effort and big payoff. It’s a crowd-pleaser you can bake on one sheet pan, slice into tidy squares, and serve to a group without breaking a sweat. Whether it’s a potluck, birthday, game night, or a casual dinner, this recipe comes together fast and disappears just as quickly.

Cleanup is minimal, the ingredients are familiar, and you can customize it to match whatever you have on hand.

What Makes This Special

Sheet Pan Dessert for a Crowd with Easy Cleanup - Simple, Big-Batch Sweet Treat

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Prep Time 15 minutes mins

Cook Time 25 minutes mins

Total Time 40 minutes mins

Servings 12 servings

Ingredients

  

• 1 cup (2 sticks) unsalted butter, melted and slightly cooled
• 1 1/2 cups packed light brown sugar
• 1/2 cup granulated sugar
• 3 large eggs, room temperature
• 1 tablespoon vanilla extract
• 2 1/2 cups all-purpose flour
• 1 teaspoon baking powder
• 1/2 teaspoon baking soda
• 1 teaspoon fine salt
• 1 1/2 cups mix-ins (choose a combo): chocolate chips, white chocolate chips, chopped nuts, dried cherries, toffee bits, or shredded coconut
• Optional: 1/2 teaspoon almond extract or 1 teaspoon cinnamon, flaky salt for finishing
• Nonstick spray and parchment paper for lining the pan

Instructions

 

• Prep the pan: Heat oven to 350°F (175°C). Lightly spray a rimmed 13x18-inch half-sheet pan and line with parchment, leaving overhang for easy lifting.
• Whisk wet ingredients: In a large bowl, whisk melted butter, brown sugar, and granulated sugar until glossy. Add eggs and vanilla; whisk until smooth and slightly thick.
• Combine dry ingredients: In a separate bowl, whisk flour, baking powder, baking soda, and salt. Stir dry ingredients into the wet mixture just until no dry spots remain. Do not overmix.
• Fold in mix-ins: Gently fold in your chosen 1 1/2 cups of mix-ins. If using almond extract or cinnamon, add now.
• Spread the batter: Dollop batter across the pan, then use an offset spatula to spread it into an even layer, reaching every corner.
• Bake: Bake 16–22 minutes, rotating the pan halfway through. Edges should be golden and set; the center should look slightly glossy but not jiggly.
• Finish and cool: If using, sprinkle a pinch of flaky salt over the top while warm. Cool in the pan on a rack for at least 20–30 minutes.
• Slice and serve: Use the parchment overhang to lift to a board. Cut into 24–30 squares. Serve warm or at room temperature.

• Feeds a crowd: One pan makes about 24–30 squares, perfect for parties and gatherings.
• Easy cleanup: Line the pan with parchment, and you’re basically done washing dishes.
• Flexible base: It’s a buttery sheet-pan blondie with mix-ins, so you can go classic chocolate chip, fruity, or nutty.
• Quick bake time: No layering, shaping, or chilling. Just mix, spread, and bake.
• Sturdy and sliceable: Great for transporting and serving without fuss.

Ingredients

• 1 cup (2 sticks) unsalted butter, melted and slightly cooled
• 1 1/2 cups packed light brown sugar
• 1/2 cup granulated sugar
• 3 large eggs, room temperature
• 1 tablespoon vanilla extract
• 2 1/2 cups all-purpose flour
• 1 teaspoon baking powder
• 1/2 teaspoon baking soda
• 1 teaspoon fine salt
• 1 1/2 cups mix-ins (choose a combo): chocolate chips, white chocolate chips, chopped nuts, dried cherries, toffee bits, or shredded coconut
• Optional: 1/2 teaspoon almond extract or 1 teaspoon cinnamon, flaky salt for finishing
• Nonstick spray and parchment paper for lining the pan

Instructions

1. Prep the pan: Heat oven to 350°F (175°C). Lightly spray a rimmed 13×18-inch half-sheet pan and line with parchment, leaving overhang for easy lifting.
2. Whisk wet ingredients: In a large bowl, whisk melted butter, brown sugar, and granulated sugar until glossy.

   Add eggs and vanilla; whisk until smooth and slightly thick.

3. Combine dry ingredients: In a separate bowl, whisk flour, baking powder, baking soda, and salt. Stir dry ingredients into the wet mixture just until no dry spots remain. Do not overmix.
4. Fold in mix-ins: Gently fold in your chosen 1 1/2 cups of mix-ins.

   If using almond extract or cinnamon, add now.

5. Spread the batter: Dollop batter across the pan, then use an offset spatula to spread it into an even layer, reaching every corner.
6. Bake: Bake 16–22 minutes, rotating the pan halfway through. Edges should be golden and set; the center should look slightly glossy but not jiggly.
7. Finish and cool: If using, sprinkle a pinch of flaky salt over the top while warm. Cool in the pan on a rack for at least 20–30 minutes.
8. Slice and serve: Use the parchment overhang to lift to a board.

   Cut into 24–30 squares. Serve warm or at room temperature.

How to Store

• Room temperature: Store in an airtight container for up to 3 days. Add a slice of bread to keep them soft.
• Refrigerator: Keeps well for 5–6 days.

  Let sit at room temp for 15 minutes before serving.

• Freezer: Wrap tightly and freeze for up to 2 months. Thaw at room temperature or warm briefly in a low oven.

Health Benefits

• Portion control made easy: Pre-cut squares help with mindful servings.
• Customizable mix-ins: Add nuts for healthy fats, or dried fruit for fiber and natural sweetness.
• Lower-sugar option: You can reduce total sugar by 1/4 cup without hurting texture, especially with chocolate or fruit mixed in.
• Swaps: Sub half the flour with white whole wheat flour for a little extra fiber without a heavy texture.

What Not to Do

• Don’t overbake: Dry, cakey bars happen fast. Pull them when the edges are set and the center is just barely done.
• Don’t skip the parchment: It guarantees easy removal and fast cleanup.
• Don’t overmix: Overworking the batter makes tough bars.

  Mix just until combined.

• Don’t overload mix-ins: Stick to about 1 1/2 cups total so the bars hold together.
• Don’t cut while piping hot: Let them cool a bit for clean slices.

Recipe Variations

• Triple Chocolate: Use a mix of dark, milk, and white chocolate chips. Add cocoa nibs for crunch.
• Cherry Almond: Dried cherries + sliced almonds + a touch of almond extract.
• S’mores: Milk chocolate chips, mini marshmallows, and crushed graham crackers on top halfway through baking.
• Salted Toffee Pecan: Toffee bits and chopped pecans, finished with flaky salt.
• Coconut Lime: Shredded coconut and white chocolate chips, plus 1 teaspoon lime zest.
• Gluten-Free: Use a 1:1 gluten-free baking flour blend and check that mix-ins are certified GF.
• Dairy-Free: Swap butter for melted dairy-free butter or coconut oil and use dairy-free chips.