Introduction to Brown Butter Chocolate Chunk Bars
Brown Butter Chocolate Chunk Bars are sturdy enough to pack for a picnic but soft enough to serve warm from the pan. Browning the butter adds a toasted, nutty note that pairs naturally with brown sugar and chocolate.
The method is straightforward: brown the butter, mix the batter, fold in the chocolate, and bake until the edges are set and the center is just firm. Let the bars cool before slicing so they hold their shape and develop a chewy texture.
Why You'll Love This Brown Butter Chocolate Chunk Bars
- Browned butter gives the bars a rich, toasted flavor without adding extra ingredients.
- The edges bake up lightly crisp while the centers stay soft and chewy.
- Chocolate chunks create larger melted pockets than standard chocolate chips.
- The batter comes together in one saucepan and one mixing bowl.
- The bars keep well for several days and are easy to portion for sharing.
Ingredients for Brown Butter Chocolate Chunk Bars
- Chocolate Chunks
- Brown Butter
- Brown Sugar
- Eggs
Use 1 cup Brown Butter, prepared by browning 1 1/4 cups unsalted butter and cooling it until warm rather than hot. Pack 1 cup Brown Sugar firmly into the measuring cup, use 2 large Eggs at room temperature, and choose 1 1/2 cups Chocolate Chunks for a mix of melted pockets and defined pieces. You will also need 2 cups all-purpose flour, 1 teaspoon baking powder, 1/2 teaspoon fine salt, and 1 teaspoon vanilla extract.
How to Make Brown Butter Chocolate Chunk Bars
Step 1: Brown the Butter
Melt 1 1/4 cups unsalted butter in a light-colored saucepan over medium heat. Cook, stirring and scraping the bottom often, until the foaming subsides and the milk solids turn amber, about 5 to 8 minutes. Pour the Brown Butter into a large heatproof bowl right away so it does not continue cooking in the hot pan. Let it cool for 15 to 20 minutes, until warm but not hot.
Step 2: Prepare the Pan and Oven
Heat the oven to 350°F. Line a 9-by-13-inch metal baking pan with parchment paper, leaving enough overhang on two sides to lift out the finished bars. Lightly grease the exposed sides and parchment. This pan size gives the bars a moderate thickness and helps them bake evenly.
Step 3: Mix the Wet Ingredients
Whisk the Brown Sugar into the cooled Brown Butter until smooth. Add the Eggs one at a time, whisking well after each addition, then whisk in the vanilla extract. The mixture may look slightly glossy and loose at this point. If the butter is still hot enough to feel uncomfortable on your finger, wait a few more minutes before adding the eggs.
Step 4: Add the Dry Ingredients
In a separate bowl, whisk together the flour, baking powder, and salt. Add the dry mixture to the butter mixture and fold with a sturdy spatula until only a few dry streaks remain. Fold in the Chocolate Chunks, stopping as soon as the batter is evenly combined. Overmixing can make the bars firm instead of chewy.
Step 5: Bake the Bars
Scrape the batter into the prepared pan and spread it into an even layer, paying special attention to the corners. Bake at 350°F for 25 to 30 minutes, rotating the pan once halfway through. The edges should be golden and set, while the center should look puffed and slightly soft. For food safety, the center should reach at least 160°F because the batter contains eggs.
Step 6: Cool and Slice
Set the pan on a wire rack and cool the bars completely, about 1 1/2 to 2 hours. Use the parchment overhang to lift the slab from the pan, then cut it into 16 squares with a sharp knife. For the cleanest edges, chill the cooled slab for 20 to 30 minutes before slicing, though the bars are also good when served slightly warm.
Tips for Success
- Use a pale saucepan when browning butter so you can see the milk solids change from pale gold to amber before they burn.
- Do not pour very hot Brown Butter directly over the Eggs, since excessive heat can partially cook them and make the batter uneven.
- Press a few extra Chocolate Chunks onto the top of the batter before baking for a more finished appearance.
- Begin checking the bars at 25 minutes because dark pans and ovens that run hot can shorten the baking time.
- Cool the bars fully before storing them in an airtight container so trapped steam does not make the edges soggy.
Equipment Needed
- 9-by-13-inch metal baking pan
- Light-colored saucepan
- Large mixing bowl
Variations
- Replace half of the Chocolate Chunks with chopped toasted pecans for a nutty variation with added crunch.
- Use dark chocolate chunks for a less sweet, more bittersweet bar.
- Add 1 teaspoon of instant espresso powder to the dry ingredients for a deeper chocolate profile.
- Bake the batter in a lined 8-by-8-inch pan for thicker bars, adding about 8 to 12 minutes to the baking time and checking the center temperature.
- Swirl 1/3 cup of smooth peanut butter over the batter before baking, using a knife to make a few broad ribbons.
Serving Suggestions
Serve the bars at room temperature with coffee, tea, or a glass of milk. For a warm dessert, heat one square for 10 to 15 seconds in the microwave and add a scoop of vanilla ice cream. Store cooled bars in an airtight container at room temperature for up to 4 days, or freeze them in a sealed container for up to 2 months. Thaw frozen bars at room temperature before serving.
FAQs about Brown Butter Chocolate Chunk Bars
Can I brown the butter ahead of time? Yes. Brown the butter up to 3 days ahead and refrigerate it in a covered container. Bring it back to a soft or liquid consistency before mixing, then let it cool to room temperature so it does not scramble the eggs.
Why did my bars turn out greasy? Greasy bars usually result from butter that was not emulsified into the sugar and eggs, butter that was measured incorrectly, or bars that were underbaked. Whisk the wet mixture thoroughly and bake until the center reaches at least 160°F.
Can I use a glass baking dish? Yes, but glass heats more slowly and retains heat longer than metal. Bake at 350°F, begin checking at 28 minutes, and allow the bars to cool fully in the dish before cutting.
How do I know when the bars are done? The edges should be golden and firm, and the center should look set rather than wet. A thermometer inserted into the center should read at least 160°F. Avoid relying only on a toothpick, since melted chocolate can make a finished bar look underbaked.
Can I double this recipe? Yes, double the batter and divide it between two 9-by-13-inch pans. Do not bake the doubled amount in one deeper pan unless you adjust the time and monitor the center carefully, since the edges can overbake before the middle is done.
Final Thoughts
These bars reward a little patience, especially while the Brown Butter cools and the baked slab sets. Once sliced, they offer a reliable mix of crisp edges, chewy centers, and generous melted Chocolate Chunks, making them a practical recipe to keep in rotation.
Looking for more? This recipe is part of our roundup of 4 Dessert Bar Recipes for Easy Baking, Sharing, and Make-Ahead Treats.
Brown Butter Chocolate Chunk Bars
Ingredients
Equipment
Method
- Brown the butter in a light-colored saucepan over medium heat until the milk solids turn amber, then cool it until warm rather than hot.
- Whisk the Brown Sugar into the Brown Butter, then whisk in the Eggs one at a time and add the vanilla.
- Whisk together the flour, baking powder, and salt, then fold the dry mixture into the wet mixture until nearly combined.
- Fold in the Chocolate Chunks, spread the batter in a lined 9-by-13-inch pan, and bake at 350°F for 25 to 30 minutes.
- Cool completely, confirm the center reaches at least 160°F, and cut into 16 bars.
Nutrition
Notes
- Cool the browned butter before adding the eggs to prevent curdling.
- The bars are done when the edges are set and the center reaches at least 160°F.
- Store cooled bars in an airtight container at room temperature for up to 4 days.
