Hi @ClayburnG. Sorry to be the bearer of bad news, but what you are seeking is not exactly possible right now. If you are dead-set on giving customers price breaks for additional toppings, you are stuck with having two modifier sets, with the second one being optional for those cases where customers only want one topping. You’d also need to remember to only allow one modifier to be chosen for each of the two sets.
I own an ice cream shop with a similar quandary for toppings. In my case, I ran the numbers using actual sales from the previous year and determined that I could achieve the same thing by just reducing the per-modifier up charge somewhat, That turned out to be much easier than mucking up my order-entry interface with multiple modifier sets with the same modifiers in each.
Otherwise, Square engineers have been given a few feature requests for enhancing modifiers to include things like this, as well as conditional and stacked modifiers. However, as of the date I write this I’ve seen no indication any of these might be on the roadmap. I only tell you this to explain why I’m not, in your case, going to suggest that you submit a feature request. it’s been done.
