- Combine the root beer, milk and pudding mix in a large bowl.
- Mix with a whisk until it begins to thicken. Fold in half of the whipped topping and desired amount of root beer extract. Start with just a little of the extract and give it a taste. You can continue adding more until desired flavor is reached. Spread into the pie crust. Refrigerate for 5 minutes. Top with remaining whipped topping.
- Slice the pie into 8 even slices (this makes it really easy to cut when it’s frozen). Add a cherry on each slice
- Freeze 8 hours or overnight.
Note: This pie will seem a little bit runny prior to freezing. Prior to freezing, slice the pie, this makes for easy serving once ready!