Preheat Oven: Start by preheating your oven to 350°F (175°C). Get your baking dish ready—an 8x8 inch pan works perfectly!
Mix Wet Ingredients: In a large mixing bowl, combine the creamy peanut butter, brown sugar, eggs, and vanilla extract. Use a whisk or a hand mixer to blend until smooth and creamy.
Combine Dry Ingredients: In a separate bowl, mix together the baking powder, salt, and flour. Gradually add this dry mixture to the peanut butter mixture, stirring until just combined.
Add Extras: If you're using chocolate chips or nuts, fold them into the batter now for that extra flavor punch!
Pour Batter: Pour the batter into your prepared baking dish, spreading it evenly.
Bake: Place your blondies in the preheated oven and bake for 20-25 minutes or until the edges are lightly golden and a toothpick inserted into the center comes out clean.
Cool and Slice: Allow the blondies to cool in the pan for about 10 minutes before transferring them to a wire rack. Once cool, cut them into squares and get ready to enjoy!