Let me link a thread that I did a while back when I started baking with Huel
Once I did it a few times, it was relatively painless. The cookies and muffins stay good for a week (and I’ve even eaten them 10 days out), so long as you store them in the refrigerator. Out of the fridge, they should be good for a day. It’s a good way to make hearty, well balanced solid food for the week.
I rewarm the muffins and spread either butter or peanut butter on top. The cookies can be eaten rewarmed, as is.
If you don’t like banana, you can use other additives. Chocolate Chips make it taste great, albeit with a bit of added sugar.
One important thing: spray your muffin tin or cookie sheet with Pam or some kind of no-stick spray. The paper muffin liner is not enough and the muffins will stick.
And yes, I basically “stole” recipes online and substituted the Huel for wheat flour. Just be aware that Huel based mixes take longer to bake than wheat flour versions.