This recipe is designed for a 9-inch square pan rather than the usual 8-inch pan. If you make it in an 8-inch pan the brownies will take more time and will be thicker.
Ingredients
2tablespoonsoilany neutral oil is fine
1 ¼cupsmilk chocolate chips or 8 oz chopped milk chocolatedivided use
3-4tablespoonscreamy peanut butter mixed with about ½ teaspoon of oil
Instructions
Preheat oven to 350°F. Grease a 9-inch square baking pan and line bottom with a piece of parchment paper.
Melt oil and half (4 oz) of the milk chocolate together in the microwave using 50% power and stirring every 30-40 seconds. Set aside to cool slightly.
Melt butter in a microwave-safe mixing bowl. Stir in sugar. Add eggs 1 at a time, whisking until mixture is glossy and smooth, then whisk in vanilla, cocoa powder, baking powder and salt. With a rubber scraper stir in the melted milk chocolate, followed by the flour. Make sure the batter is cool, then stir in the milk chocolate chips.
Spread batter in pan. If you'd like to add a peanut butter swirl, mix together creamy peanut butter and oil and spoon it over the batter. Run a knife through to create a marbled effect.
Bake until a wooden pick or skewer comes out with a few moist crumbs adhering, 25 to 30 minutes.