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”.
If there is like 12gr left, I’ll adjust my recipe a bit and make smaller cup. Especially if the coffee is very bold or funky.
Otherwise I’ll mix it with beans that are similar. I usually have four or five bags open.