160g King Arthur Unbleached All-Purpose Flour
112g old-fashioned rolled oats
1/2 teaspoon baking soda
1/2 teaspoon table salt
100g oil
120-140g brown sugar, packed
1/2 teaspoon vanilla
1 large egg
1 cup misc. mix-ins
- In a medium bowl, whisk together the flour, oats, baking powder, baking soda, and salt.
- In a large bowl, whisk the melted butter, sugar, and vanilla until smooth and homogeneous. Add the egg and whisk until fully combined and creamy. Add the dry ingredients and use a flexible spatula to stir until almost no flour is visible. Add the dates and stir until completely combined.
- Line a baking sheet with parchment. Scoop the dough into eight 2″ balls and place on the prepared baking sheet. Cover and refrigerate for at least 1 hour and up to 2 days.
- Preheat the oven to 370°F with a rack in the upper third. Shape the dough mounds into neater balls by rolling between the palms of your hands. Return to the baking sheet, spacing them evenly.
- Bake the cookies for 8 minutes, until puffed, with golden-brown exteriors. Remove the baking sheet from the oven and immediately use a flat spatula to press each cookie flat, eliminating any puffing.
- Return the cookies to the oven, turn the oven off, and leave inside for 4 to 5 minutes, until the cookies are slightly darker and have puffed back up.
- Remove the baking sheet from the oven, press the cookies flat again, then sprinkle with flaky salt. Let the cookies cool completely on the baking sheet before serving.
- Store oatmeal-date cookies airtight at room temperature for up to 5 days; freeze for longer storage.