Oat milk followed by homemade cashew milk. I found coconut milk and almond milk both to be too watery tasting.

Edit: Here is my recipe for nut/seed milk. This works for cashews, sunflower seeds, hemp seeds, and pepitas. I haven’t tried it with other nuts or seeds.

• 1/3c nuts or seeds
• 4c water
• Sweetener of choice (I just use 2 Splenda packets but I’ve also used agave and pitted dates)
• 1/8tsp salt
• 1/8tsp xanthan gum (can be ommitted but it helps the texture IMHO)
• 1/2tsp vanilla (optional)

Blend seeds or nuts with water, salt, and sweetener in a high speed blender. Strain through a nut milk bag. Add xanthan gum and re-blend. Stays good for a week or more.