Leave butter at room temperature until it is softened. Add the butter to a small bowl and use the back of a fork to mash it. Keep mashing the butter until it’s lump-free and smooth so it melts easily in your hot drink. Add your brown sugar substitute, vanilla extract, cinnamon, clove, nutmeg, and salt to the bowl.
Step 2
Use your fork to blend the butter and spices together into a creamy butter ball. Place the cinnamon butter ball into the bottom of an 8 fl oz glass. Heat your water via microwave, electric kettle, or stovetop just until it’s hot or just below simmering. Pour the hot water over the butter in the glass, then pour your rum of choice into the glass as well.
Step 3
Stir the contents of the glass until the butter melts completely and emulsifies with the hot drink. You can garnish the buttered rum with an extra sprinkle of cinnamon or nutmeg. If you want the drink to be sweeter, add your favorite low-carb sweetener. Enjoy while hot!