In a large bowl, combine the creamy peanut butter, powdered sugar, and graham cracker crumbs. Mix well until you have a smooth, dough-like consistency.

Using your hands, shape the mixture into small balls, about 1 inch in diameter. Place them on a parchment-lined baking sheet.

Refrigerate the balls for about 30 minutes, allowing them to firm up.

In a microwave-safe bowl, combine the semi-sweet chocolate chips and coconut oil (if using). Microwave in 30-second increments, stirring until melted and smooth.

Remove the chilled peanut butter balls from the fridge. Dip each ball into the melted chocolate, allowing any excess to drip off.

Place the chocolate-covered balls back on the parchment paper. Sprinkle your toppings before the chocolate sets.

Let the chocolate harden at room temperature or place the tray in the refrigerator for about 15 minutes. Enjoy your delightful Peanut Butter Balls!