1/2 cup butter, melted
1/2 cup plus 2 Tbs. firmly packed light brown sugar
2 large eggs
1 tsp. vanilla extract
3/4 cup unbleached all-purpose flour
1/2 tsp. baking soda
1/4 tsp. salt
1-1/2 cups oatmeal
3/4 cup semisweet chocolate chips (I used half chocolate and half white chocolate)
Heat the waffle iron.
In a large bowl, mix the butter and brown sugar until smooth. Mix in the eggs and vanilla. Stir in the flour, baking soda, and salt. Stir in the oats and chocolate chips.
Use a small ice cream scoop to portion out a cookie onto each waffle square. Close the iron and cook until set and beginning to brown, 1-1/2 to 3 minutes, depending on the heat of your waffle iron. Transfer the cooked cookies to a wire rack and repeat with the remaining dough.