Step 1: Preheat & Prepare

• Preheat oven to 400°F (204°C).
• Grease a large rimmed cookie sheet or line with parchment paper.

Step 2: Mix Dry Ingredients

• In a large bowl, whisk together flour, sugar, baking soda, and salt.

Step 3: Whisk Wet Ingredients

• In a separate bowl, whisk together milk, vanilla extract, and beaten eggs.

Step 4: Melt Peanut Butter & Butter

• In a saucepan, melt butter and peanut butter over medium heat, stirring constantly.
• Bring to a gentle boil, then remove from heat.

Step 5: Combine Ingredients

• Gradually add the peanut butter mixture to the dry ingredients, stirring continuously.
• Slowly mix in the milk and egg mixture until well combined.

Step 6: Bake the Bars

• Pour batter into the prepared baking sheet, spreading evenly.
• Bake for 20 minutes, or until a toothpick inserted in the center comes out clean.
• Let cool completely before frosting.

Step 7: Prepare the Frosting

• In a saucepan, melt butter and peanut butter over medium heat, stirring until smooth.
• Remove from heat and stir in 2 tablespoons milk.
• Gradually mix in powdered sugar, whisking until smooth.

Step 8: Frost the Bars

• Spread the warm frosting evenly over the cooled bars.
• Let set for at least 30 minutes before cutting into squares.