Irresistible Baked Peanut Butter Cup Pretzel Bars

Ingredients

• 2 cups crushed pretzels
• 1/2 cup brown sugar, packed
• 1/2 cup unsalted butter, melted
• 1 cup creamy peanut butter
• 1/2 cup powdered sugar
• 1 teaspoon vanilla extract
• 1 cup semi-sweet chocolate chips
• 1 tablespoon vegetable oil