Lunchroom Chocolate Peanut Butter Bars.

Ingredients

• 2 teaspoons vanilla extract
• 2-3 cups powdered sugar
• 2 cups all-purpose flour
• 1 1/2 sticks salted butter
• 2 cups creamy peanut butter
• 1 teaspoon baking powder
• 2 large eggs, at room temperature
• 1/4 cup granulated sugar
• 3/4 cup light brown sugar
• 1 tablespoon vanilla extract
• 1/2 teaspoon kosher salt
• 1/4 cup warmed milk
• 1 stick salted butter, at room temperature
• 1/2 cup cocoa powder