Ingredients
Method
Preparation
- Preheat the oven to 350°F (175°C) and line baking sheets with parchment paper.
- In a mixing bowl, beat the peanut butter and butter until smooth.
- Stir in the brown sugar and beat until the mixture is homogenous and slightly glossy.
- Beat in the egg and vanilla until fully incorporated.
- In another bowl, whisk together flour, cornstarch, baking soda, and salt.
- Gradually add the dry mix to the wet and stir until a soft dough forms. Don’t overmix.
- Use a tablespoon to scoop dough into balls, place on the prepared sheets, and gently flatten each ball.
Baking
- Bake for 8–10 minutes, until the edges are lightly golden but centers still look slightly soft.
- Transfer cookies to a wire rack and cool completely before filling.
Filling and Assembly
- Whisk together the filling ingredients until smooth and pipeable.
- Spread or pipe about a teaspoon (or more, to taste) of filling on the flat side of one cookie and sandwich with another.
- Enjoy right away or chill briefly to set the filling.
Notes
Store in an airtight container at room temperature for 2-3 days. Refrigerate filled sandwiches for up to 5-7 days. Freeze baked, unfilled cookies for up to 3 months.
