i ate a weed cookie when i did shrooms once and it was the most disgusting cookie i've tasted but had a shitload of weed in it. I tripped balsy balls on that for hours and hours. Never had such a hard trip before. Was the craziest experience. Probably not the best idea to eat shrooms with them but i ate the shrooms about 2 hours before so i think the weed kicked it up a notch.
Id rather not taste the weed so I'd recommend grinding it up fine or cut it up with scissors and cook it like you would normally