1️⃣ Prep & Preheat
Preheat oven to 350°F (175°C). Line an 8x8-inch pan with parchment paper.
2️⃣ Make the Dough
Whisk melted butter, peanut butter, sugars, egg + yolk, and vanilla until smooth.
Fold in flour, baking soda, and salt until just combined (don’t overmix!).
Stir in add-ins (if using).
3️⃣ Bake to Perfection
Press dough evenly into the pan.
Bake 20-25 mins until edges are golden but center is slightly soft.
Cool 15 mins before slicing—they’ll firm up as they cool!
Pro Tips
🔪 Clean cuts: Use a plastic knife for gooey bars.
🍫 Swirl it: Melt extra peanut butter + chocolate to drizzle on top.
📆 Storage: Keep in an airtight container for up to 5 days (or freeze for 2 months).
Variations to Try
🍯 Honey Peanut Butter: Swap ¼ cup sugar for honey.
🌰 Nutty Bliss: Use almond butter + chopped almonds.
🥜 PB&J Bars: Swirl in 2 tbsp jam before baking.