In a medium saucepan, combine the eggs, egg yolks, and maple syrup. Slowly whisk in the almond milk, making sure it mixes. Add in the cinnamon, nutmeg and vanilla.
Heat over low heat, whisking continually, until mixture thickens. It should be thick enough to coat the back of a spoon. This could take up to 20 minutes.
Once thick, pour into a container and let cool at room temperature. Then refrigerate.
Store in fridge up to 4 days. Stir or shake before serving.
Notes
If the egg nog separates, use an immersion blender or regular blender to combine.