Ingredients
Method
- Preheat oven to 175°C / 350°F. Line an 8×8 inch (20×20cm) metal pan with parchment, leaving overhang on two sides. Measure out 80g of peanut butter into a small bowl for the swirl; set aside.
- Melt butter and chopped chocolate together over a double boiler or in 30-second microwave bursts, stirring until smooth. Cool 10 minutes.
- Add sugar to the cooled chocolate mixture and whisk vigorously for 1 to 2 minutes.
- Add eggs one at a time, whisking 30 seconds after each. Add vanilla and the 80g of batter peanut butter. Whisk for 60 seconds until smooth, glossy, and slightly thickened.
- Sift flour, cocoa powder, salt, and baking powder into the bowl. Fold with a rubber spatula until no dry streaks remain — about 20 strokes. Stop immediately.
- Pour batter into the prepared pan and smooth to the edges. Warm the reserved 80g of swirl peanut butter in the microwave for 20 seconds until just pourable. Drop in 8 to 10 spoonfuls across the surface. Drag a knife or skewer through in a figure-eight pattern — 6 to 8 passes. Scatter flaky salt over the top.
- Bake 28 to 32 minutes — toothpick in the chocolate center should come out with moist fudgy crumbs. Cool in the pan 1 hour, then refrigerate 30 minutes. Cut with a hot dry knife wiped between every cut.
Notes
Stir natural peanut butter from the bottom before measuring — it separates in the jar.
• Warm the swirl PB only 20 seconds — thick honey consistency, not liquid.
• Maximum 6 to 8 swirl passes — more blends the PB fully into the chocolate.
• Test doneness in the chocolate, not the swirl — PB areas always look less done.
• Refrigerate before cutting — PB fat makes the crumb softer than plain brownies at room temp.
Cal: ~315Fat: 20gCarbs: 30gSugar: 22gProtein: 6g
Per brownie (16 from one 8×8 pan). Approximate — use a nutrition calculator for precise values before publishing.