Deb’s Passover Brownies

Ingredients

• 1 cup butter
• 4 (1 ounce) squares unsweetened baking chocolate
• 4 eggs
• 2 egg whites
• 2 cups white sugar
• 0.25 cup strong brewed coffee
• 2 teaspoons kosher for Passover vanilla flavoring
• 1 cup potato starch
• 2 tablespoons potato starch
• 0.25 cup matzo cake meal
• 2 tablespoons matzo cake meal
• 0.25 cup unsweetened cocoa powder
• 0.5 teaspoon salt
• 6 ounces semisweet chocolate chips

Steps

1. Preheat the oven to 350 degrees F (175 degrees C). Grease two 8×8-inch baking pans.
2. Place butter and chocolate in the top of a double boiler over simmering water. Stir frequently, scraping down the sides with a rubber spatula to avoid scorching, until butter and chocolate are melted; mix well.
3. Meanwhile, beat eggs and egg whites together in a large bowl with an electric mixer on high speed until very fluffy, about 5 minutes. Gently stir butter-chocolate mixture, sugar, coffee, and vanilla flavoring into egg mixture; beat well to combine.
4. Combine potato starch, matzo cake meal, cocoa powder, and salt in a medium bowl; beat into chocolate-egg mixture until fluffy and thoroughly combined. Gently fold in chocolate chips until incorporated. Divide batter between the prepared baking pans.
5. Bake in the preheated oven until a toothpick inserted into centers shows moist crumbs, 25 to 30 minutes.