Chocolate Oatmeal Cookies | America's Test Kitchen

Ingredients

• 1 3/4 cups (5¼ ounces/149 grams) old-fashioned oats
• 1 cup (5 ounces/142 grams) all-purpose flour
• 3/4 teaspoon baking powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon table salt
• 10 tablespoons unsalted butter, softened but still cool
• 1 cup packed (7 ounces/198 grams) light brown sugar
• 1 large egg
• 1 teaspoon vanilla extract
• 3 ounces (85 grams) milk chocolate, melted and cooled
• 1 cup (6 ounces/170 grams) semisweet chocolate chips
• 1 cup pecans or walnuts, chopped