1. Crush granola bars into fine crumbs using a food processor or rolling pin.
2. Melt butter and mix it with granola crumbs and sugar until combined.
3. Press half of the crumb mixture into the bottom of a lined or greased 9×9-inch pan to form the crust.
4. In a large mixing bowl, beat the cream cheese until smooth.
5. Add sweetened condensed milk, almond extract, and rum to the cream cheese, mixing until well combined.
6. Gently fold in the whipped topping until the mixture is light and fluffy.
7. Fold in holiday sprinkles to add festive color to the filling.
8. Spread the filling evenly over the prepared crust in the pan.
9. Sprinkle the remaining granola mixture over the top of the filling, pressing slightly to adhere.
10. Add more holiday sprinkles on top for extra decoration.
11. Cover the pan with plastic wrap and freeze for at least 4-6 hours, or until firm.
12. Before serving, let the cake sit at room temperature for a few minutes to soften slightly for easier slicing.
13. Cut into squares and serve chilled.
14. Store any leftovers in the freezer, covered, for up to a week.
15. For variations, experiment with different crust options like vanilla wafers or pretzels, or use peppermint extract for a holiday twist.