- cooking spray
- 1 cup butter
- 4 (1 ounce) squares unsweetened chocolate
- 2 cups white sugar
- 4 large eggs
- 1 teaspoon vanilla extract
- 1 cup all-purpose flour
- 1 pinch salt
- 1 cup semisweet chocolate chips
- 1 cup chopped walnuts
- 2/3 cup oats
- Preheat oven to 350 degrees F (175 degrees C). Spray a 9×13-inch baking dish with cooking spray.
- Melt butter and unsweetened chocolate together in the top of a double boiler over simmering water, stirring frequently and scraping down the sides with a rubber spatula to avoid scorching. Remove from heat and pour chocolate mixture into a bowl.
- Mix sugar, eggs, and vanilla extract into chocolate mixture using a fork. Stir flour and salt into chocolate mixture until batter is smooth; fold in chocolate chips, walnuts, and oats. Pour batter into the prepared baking dish.
- Bake in the preheated oven until brownies are beginning to pull away from sides and middle is done, 25 to 30 minutes. Cool before cutting.