Combine the water, almond butter, sweet potato, maple syrup, vanilla extract, nutmeg, and cinnamon in a high-speed blender. Secure the lid and blend until smooth.
Taste the drink and add another tablespoon of maple syrup if you'd like it to be sweeter. (Keep in mind that sweetness is muted when chilled, so it won't taste quite as sweet when you serve it cold.)
Serve the eggnog right away over ice, or transfer it to an airtight container and store it in the fridge until you're ready to serve. Add alcohol if you like. Leftover eggnog can be stored in an airtight container in the fridge for up to 48 hours. (It makes a great coffee creamer!)
Notes
Nutrition information is for 1 serving, or roughly 1 1/4 cups. This information is automatically calculated and is just an estimate, not a guarantee.Note: You can replace the almond butter and water in this recipe with 2 cups of your favorite non-dairy milk, like soy milk or almond milk, instead.For tips on baking a sweet potato, see my full tutorial here. Update Note: This recipe was updated in December 2023. I replaced 2 tablespoons of hemp hearts with 1 tablespoon of almond butter because nut butter tends to be a more common pantry ingredient. If you'd like ginger in this drink, add 1/16 tsp ground ginger and a pinch of salt to boost the flavor.