Peanut Butter Stuffed Brownies

1. In a medium bowl, beat together the peanut butter, softened butter, powdered sugar, and vanilla extract until smooth and creamy.

4. Assemble the Brownies:

1. Pour half of the brownie batter into the prepared pan, spreading it evenly to the edges.

2. Drop spoonfuls of the peanut butter filling over the brownie batter, spreading it gently into an even layer.

3. Pour the remaining brownie batter over the peanut butter layer, spreading it carefully to cover the peanut butter filling completely.

5. Bake the Brownies: