Found this in my great aunts recipe box from 1962 and made it for mothers day brunch. My mom cried actual tears

For a crunchier top, remove the slow cooker insert when the betty is done and briefly place it (if oven-safe) under the broiler for 2 to 3 minutes, watching closely so it doesn’t burn. You can also swap part of the breadcrumbs for crushed plain graham crackers for a slightly more cookie-like flavor.

Food safety tips: Keep the slow cooker covered while cooking to maintain a safe temperature. If you prep the apples ahead, toss them with a little lemon juice and store covered in the refrigerator; do not leave sliced apples at room temperature for more than 2 hours. Leftovers should be cooled, then stored in an airtight container in the refrigerator and eaten within 3 to 4 days. Reheat gently in the microwave or in the slow cooker on warm until heated through.