What can I bake for my nut allergic friend? I have a friend who has tree-nut allergy so he isn't able to eat any kinds of nuts, because of this every single time I bake something for my class he can't eat it because of his allergy. When I searched up recipes that are nut-free, I can't be 100% sure that it will be safe for him to eat it, I understand if he eats something with nuts in it can cause a deadly reaction and I don't want him to risk his life eating my cookies. What are some recipes for baking cookies that I can guarantee that it will be safe for him to eat?
Step 1 should always be to ask  which ingredients exactly you need to stay clear of, just in case it's more than nuts.

My - possibly naïve - assumption would be that basic recipes that stick to flour, sugar, eggs, butter and possibly dairy should probably be ok. Chocolate could be dangerous as the factories often use nuts as well, so there is a risk of cross-contamination, but cocoa should be safe. Note that some oils can be made (partly) from peanuts, so read the label or use butter.

Once you have verified the extent of allergies, you will have a "safe ingredients list". 

From there, choose the type of baked product and search for basic recipes - the no-frills, few-ingredients recipes are a good place to start. 

Unless you choose a recipe that uses nuts as main ingredient (sorry, no macarons for your friend) the options are almost endless, in my experience.