Adapted from joyofbaking.com


Oatmeal Base:

1/2 cup unsalted butter, room temperature

1 cup light brown sugar

1 large egg

1 teaspoon pure vanilla extract

1 1/4 cups wheat flour

1/2 teaspoon baking soda

1/4 teaspoon salt

2 cups rolled oats, divided

Filling:

1 cup raspber...


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