No, Rumchata does not go bad in the fridge. Although it is best to enjoy the creamy liqueur at room temperature, you can safely store Rumchata in the refrigerator without any problems. Unlike other spirits and liqueurs that are made from a grain base, such as vodka or whiskey, Rumchata's ingredients and recipe mean that it will not spoil when stored for a long period of time.
Rumchata is made from Caribbean rum, cream from Wisconsin cow’s milk, organic agave syrup and other flavors including cinnamon, cocoa and vanilla. This combination of all-natural ingredients makes it shelf-stable with an indefinite shelf life. Once opened however there may be some subtle changes in taste after extended storage because of oxidation but this will still be safe to consume past its printed expiration date on the label (if any).
Having said that – if you store your bottle of RumChata for longer than 12 months then we recommend discarding it sooner rather than later as its taste might change over time even if fixed properly! So overall feel free to store your bottle of deliciousness in the fridge and enjoy whenever you like!