Ton-Tongue Toffees are a classic from Weasleys’ Wizard Wheezes that hold a special place in Dudley Dursley’s heart. Toffee Bars from the Betty Crocker cookbook hold a special place in my heart because they were one of the first things I baked when I was a kid, and I used to make them all the time. I haven’t had them in years, but they are very easy to veganize by using margarine/earth balance and substituting 1 tablespoon ground flax and 3 tablespoons water for the egg. I think you could get away with leaving the egg out all together, but they might be a little bit more like shortbread. My favorite part of these is spreading the chocolate on at the end.
If you wrap them up in cute little papers like candies, they would be perfect for a Potter party favor.