Chocolate is a good way to cover the taste of mushrooms. In the past I would make chocolate drinks with my mushrooms.
This is what I do:
1. I was drinking chocolate Muscle Milk at the time so I would mix up my Muscle Milk and then blend in my fresh mushrooms. This works for dry mushrooms too but I prefer fresh ones for this.
2. I ten blend in about 30 - 100g of fresh mushrooms into the drink.
3. I chug the drink. Not only does the chocolate cover the taste well but I get a decent amount of calories and nutrients for my tripp.
I would think chocolate milk would work well too. Just add in a lot of chocolate in the milk to cover the taste not to mention that milk helps with nausea. Smoking cannabis also helps with nausea.