Ingredients
- 2 sticks (227 grams) unsalted butter
- 1/2 (100 grams) cup granulated sugar
- 1 cup (200 grams) lightly packed dark brown sugar
- 1 1/2 cups (190 grams) all-purpose flour
- 1 cup (127 grams) bread flour
- 1 teaspoon baking soda
- 1/2 teaspoon baking powder
- 1 teaspoon fine sea salt
- 1 teaspoon instant espresso powder, optional
- 2 large eggs plus 1 egg yolk, at room temperature
- 2 teaspoons vanilla
- 10 ounces (283 grams) semisweet chocolate, chopped
- 1 cup
homemade toffee bits , or Heath brand - Flaky sea salt, for finishing