Ingredients:
6 Tablespoons (3 ounces) unsalted butter, softened
1 Tablespoon white miso
1/2 cup firmly packed light brown sugar
1/4 cup plus 1 tablespoon granulated sugar
1 large egg
1 teaspoon pure vanilla extract
1 cup (5 ounces) unbleached all-purpose flour
1/4 teaspoon baking soda
1/4 teaspoon baking powder
1/4 teaspoon salt
1 cup old-fashioned rolled oats
1 bag butterscotch chips
Procedure:
Preheat oven to 350˚ F and position an oven rack in the center of the oven.
In a medium bowl, whisk together flour, baking soda, baking powder and salt. Set aside.
Place butter, miso, brown sugar, and granulated sugar in the bowl of a stand mixer fitted with a paddle attachment and beat on medium speed until smooth and blended, scraping halfway through, about 2 minutes. Add the egg and vanilla and blend well.
Add flour mixture to the butter mixture all at once. Turn the mixer to the lowest speed and blend slowly, just until there are no more patches of flour. Stop and scrape bowl.
Add the oats and butterscotch chips and blend on low just until combined. Remove the bowl from the mixer and stir gently a few times with the spatula to make sure there are no more patches of unincorporated flour or butter.
Drop the dough in tablespoon-size mounds onto parchment-lined baking sheets approximately 2 inches apart. For less spreading in your cookies, refrigerate for 15-20 minutes before baking.
Bake the cookies one sheet at a time, rotating the sheet halfway through, for 13 to 16 minutes, until the cookies are golden brown at the edges and still a bit pale in the center. Transfer to a cooling rack and let the cookies cool completely.
Keep the cooled cookies in an airtight container at room temperature for 3 to 4 days.