Chunky peanut butter and oatmeal chocolate chipsters

Ingredients

• 3 cups old fashioned oats
• 1 cup all purpose flour
• 1 teaspoon baking soda
• 2 teaspoons ground cinnamon
• 1/4 teaspoon freshly ground nutmeg
• 1/4 teaspoon salt
• 2 sticks (8 ounces) unsalted butter, at room temperature
• 1 cup peanut butter–chunky (my choice) or smooth (but not natural)
• 1 cup sugar
• 1 cup (packed) light brown sugar
• 2 large eggs
• 1 teaspoon pure vanilla extract
• 9 ounces bittersweet chocolate, chopped into chunks, or 1 -1/2 cups store-bought chocolate chips or chunks