Brownie-and-Peanut-Butter Ice Cream Sandwiches

INGREDIENTS

Eggs, large

2 cups

All-purpose flour

1 1/2 tsp

Baking powder

7 oz

Chocolate, unsweetened

1 1/2 tsp

Salt

2 2/3 cups

Sugar

2 tsp

Vanilla extract, pure

Vegetable-oil cooking spray

Peanut butter ice cream

11 ounces (2 sticks plus 6 tablespoons) unsalted butter, room temperature