Part pie, part cookie, all delicious. These buttery plum crumble bars are easy to make, loaded with juicy fruit, and topped with a golden oat crunch. The perfect lazy baker's treat.
Store at room temperature in an airtight container for 2–3 days or refrigerate up to 5 days. Freeze individually wrapped bars for up to 3 months. Let bars come to room temperature before eating for best texture.