
One-bowl cocoa brownies
A glossy top and a rich chocolate center, made with cocoa powder and everyday baking staples.

Category inspiration, not a photograph of this recipe. Recipes are AI-assisted and not independently kitchen-tested.
Let’s make it.
Prepare the pan
Heat the oven to 350°F / 175°C. Line an 8-inch / 20 cm square baking pan with parchment, leaving a little overhang.
Mix the base
Melt the butter and let it cool until warm, not hot. Whisk in sugar, then eggs and vanilla until well combined. Do not taste batter containing raw flour and egg.
Fold gently
Sift in cocoa, flour, and salt. Fold just until no dry flour remains. Spread evenly into the pan.
Bake and cool
Bake 22–28 minutes, until the edges are set and a toothpick near the center has moist crumbs but no liquid batter. Cool completely in the pan before lifting out and cutting into 9 squares.
Make it your own
Add 50 g chocolate chips for extra chocolate. Add nuts only if suitable for everyone eating them.
Refrigerate perishable leftovers promptly. Read our food storage guide.
Before you cook
Use unsweetened cocoa rather than sweetened drink powder and the stated 20 cm square pan. Cool melted butter before adding eggs. Weight-based flour measures prevent accidentally drying the batter.
Troubleshooting & doneness
Do not taste raw batter containing egg and flour. Look for set edges and no liquid batter; moist crumbs are different from uncooked batter. Cool fully before cutting. A larger pan gives thinner brownies and shorter baking time.
Substitution decisions
Chocolate chips and nuts change sweetness, texture and allergens. Cocoa type changes flavor; do not assume every flour or egg substitute behaves identically. For major dietary changes, choose a recipe designed for them.
Safe handling and leftovers
Keep raw foods separate from ready-to-eat food, clean hands and equipment, and do not rely on color alone for safe meat or fish doneness. Refrigerate perishable leftovers within two hours, or one hour above 90°F / 32°C, in shallow containers at 40°F / 4°C or below. Use refrigerated cooked leftovers within four days; reheat leftovers to 165°F / 74°C. These notes are editorial guidance, not evidence this recipe was kitchen-tested.
Sources: safe cooking temperatures and safe food handling.
