In our house, we generally go for variety in our coffee beans. That means when we are finishing one bag, we’re going to open a different bag with totally different beans inside.
What do you do if there aren’t enough old beans to make a full serving of coffee?
It may be heresey, but I mix the final old beans with a few beans from the new bag and call it my “bonus blend”.
I usually mix grounds and deal with a weird cup but you can also mix a small number of grounds with vanilla ice cream as a topping. I’m sure it can be an additive to a few other things, as long as it’s fine enough but to disrupt the texture of things too much.