Dorie Greenspan “Baking: From My Home to Yours”
3/4 teaspoon baking powder
1/2 teaspoon baking soda
1/2 teaspoon salt
2 sticks (8 ounces) unsalted butter, at room temperature
1 1/2 cups (packed) light brown sugar
1/2 cup sugar
2 large eggs
1 teaspoon pure vanilla extract
6 ounces bittersweet chocolate, chopped into chips, or 1 cup store-bought chocolate chips
1 cup butterscotch chips or Heath Toffee Bits, I used Toffee Bits
1 cup coarsely chopped walnuts
1 cup sweetened shredded coconut
Center a rack in the oven and preheat the oven to 325 degrees F. Butter a 9×13-inch baking pan and put it on a baking sheet.
Whisk together the flour, baking powder, baking soda and salt.
Beat the butter on medium speed in a large bowl until smooth and creamy. Add both sugars and beat for another 3 minutes, or until well incorporated. Add the eggs one by one, beating for 1 minute after each addition, then beat in the vanilla. Reduce the mixer speed to low and add the dry ingredients, mixing just until they disappear into the batter. Using a rubber spatula, stir in the chips, nuts and coconut. Scrape the batter into the buttered pan .
Bake for about 40 minutes, or until a knife inserted into the center of the Blondie comes out clean. The blondies should pull away from the sides of the pan a little and the top golden brown.