Add the remaining thawed frozen green beans. Transfer the creamy beans to a casserole dish. Top with crispy onions. Bake until golden brown on top. Let sit to cool and set before serving.

When using frozen, blanch them for 1 minute instead ... I love cremini (baby bella) mushrooms in this green bean casserole.

Green bean casserole has always been my favorite Thanksgiving ... Can I use canned or frozen green beans instead of fresh? Yes, you can use canned or frozen green beans, but be sure to drain ...