Step 1

Preheat oven to 325°F (163°C).

Step 2

Line a 9” cake dish with parchment paper and grease lightly.

Step 3

Separate egg whites and yolks into two bowls.

Step 4

Beat egg whites until stiff peaks form, set aside.

Step 5

Melt chocolate chips in a microwave-safe bowl, using 30-second intervals and stirring in between. (Ensure chocolate chips are suitable for melting in a microwave.)

Step 6

Once melted, gently fold in egg yolks into the chocolate.

Step 7

Carefully fold in the egg whites, maintaining the mixture’s fluffiness.

Step 8

Pour mixture into the prepared dish.

Step 9

Drizzle peanut butter over the top and use a butter knife to create swirls.

Step 10

Bake for 30 minutes or until the brownies are set.

Step 11

Allow to cool before cutting into servings.