Blend the base: Add almond milk, heavy cream, egg yolks, sweetener, vanilla, nutmeg, cinnamon, salt, and rum extract (if using) to a blender. Blend until smooth and frothy.
Add protein: Sprinkle in the protein powder.
Blend on low, then medium, until fully incorporated. Avoid over-blending to keep it creamy and not foamy.
Thicken (optional): If you prefer a thicker pudding, add xanthan gum while blending on low, or stir in chia seeds by hand. Let chia sit 10 minutes, then blend again briefly.
Taste and adjust: Sweetness can vary by sweetener and protein brand.
Add a little more sweetener or spice if needed.
Chill: Pour into jars or bowls. Refrigerate for at least 1–2 hours, or overnight for a firmer set.
Serve: Top with a dollop of whipped cream and a dusting of nutmeg. Enjoy cold.