One-Bowl Brownie Bars with Espresso and Walnuts
Dense, fudgy brownie bars enhanced with a hint of espresso and crunchy toasted walnuts, made in a single bowl for quick cleanup. This american-inspired desserts ready in about 45 minutes layers (2 sticks), melted unsalted butter, granulated sugar, unsweetened cocoa powder into a dessert worth slowing down for — great for weekend baking, holiday tables, or any time you want a sweet payoff at the end of a meal. Each serving lands at about 230 calories and feeds 16, so it slots into a weekend bake or a special-occasion dessert tray. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.
Ingredients
- 1 cup (2 sticks), melted unsalted butter
- 1 1/2 cups granulated sugar
- 3/4 cup, unsweetened cocoa powder
- 1 tbsp espresso powder
- 1 tsp vanilla extract
- 3 large eggs
- 1 cup all-purpose flour
- 1/2 tsp salt
- 3/4 cup, toasted chopped walnuts
Instructions
- Step 1: Preheat oven to 350°F. Lightly grease a 9x9-inch baking pan and line with parchment paper, leaving an overhang for easy removal.
- Step 2: In a large mixing bowl, whisk together 1 cup melted unsalted butter, 1 1/2 cups granulated sugar, 3/4 cup unsweetened cocoa powder, and 1 tbsp espresso powder until smooth and glossy.
- Step 3: Whisk in 1 tsp vanilla extract, then add 3 large eggs one at a time, beating well after each addition until the batter is thick and shiny.
- Step 4: Stir in 1 cup all-purpose flour and 1/2 tsp salt just until combined, then fold in 3/4 cup toasted chopped walnuts evenly.
- Step 5: Pour batter into prepared pan and spread evenly. Bake for 28-32 minutes, or until a toothpick inserted in the center comes out with moist crumbs.
- Step 6: Cool completely in the pan on a wire rack before lifting out using the parchment overhang. Cut into 16 bars and serve.
Equipment for this recipe
Top-rated tools to make this recipe successfully.
Frequently asked questions
How long does One-Bowl Brownie Bars with Espresso and Walnuts take to make?
Total time is about 45 minutes (15 min prep + 30 min cook). Most home bakers find this fits a weekend afternoon; chill or store as the recipe directs before serving.
How do I store leftover One-Bowl Brownie Bars with Espresso and Walnuts?
Cool fully before storing. Most baked desserts keep at room temperature in an airtight container for 2–3 days, or in the fridge for up to 5 days. Cream- or custard-based desserts must go in the fridge within 2 hours; reheat gently or serve cold per the recipe.
Can I substitute ingredients in One-Bowl Brownie Bars with Espresso and Walnuts?
Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.
How do I scale One-Bowl Brownie Bars with Espresso and Walnuts for a different number of people?
The recipe is written for 16 servings. Multiply each ingredient by (your serving target / 16). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.
What goes well with One-Bowl Brownie Bars with Espresso and Walnuts?
American desserts like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.
