Mini Peanut Butter Pretzel Custard Tarts

Ingredients

• 3, cups ,peanut butter-filled pretzels, finely crushed
• 6, tbsps ,butter, melted
• 1/3, cup ,brown sugar
• 1 1/4, cups ,whole milk
• 6, ,Oakdell cage-free egg yolks
• 1/4, cup ,granulated sugar
• 1/2, tsp ,vanilla extract
• 1, tsp ,cinnamon
• 1, cup ,whipped topping, thawed