World's Best Peanut Butter Bars

Ingredients

• 1 1/2 Tablespoon milk
• 1/2 teaspoon vanilla extract
• 1 teaspoon vanilla extract
• 1 Tablespoon unsweetened cocoa powder
• 1/2 cup creamy peanut butter
• 1 1/4 cup powdered sugar
• 1/2 cup granulated sugar
• 3/4 Tablespoon baking soda
• 3/4 cup butter
• 1 cup light brown sugar
• 1 1/2 cup all-purpose flour
• 2 cups old-fashioned rolled oats
• 2 large egg
• 1/2 teaspoon salt
• 1/4 cup butter