Apple-Rhubarb Betty

A Betty is one of the oldest American fruit desserts, and this apple-rhubarb version uses a smart shortcut: canned apple pie filling combined with frozen rhubarb cooked down with sugar and cornstarch.

The rhubarb goes first. That cornstarch and sugar mixture cooks over medium heat until thick and bubbly, concentrating the tartness and building enough structure to hold up under two layers of crumb topping.

The crumb mixture is the distinctive part here: bread cubes and graham cracker crumbs combined with brown sugar, cinnamon, apple pie spice, and melted butter. Graham crackers bring a honeyed sweetness that plain breadcrumbs can’t match. Layering fruit and crumbs twice means every bite gets both the soft, bubbling rhubarb and the crispy topping.

Bake covered first to steam the fruit through, then uncover for the last 10 minutes to crisp the top.

Kitchen Tips

• Cook the rhubarb until genuinely thick and bubbly, a thin base makes the bottom layer soggy
• Cut bread into small, even cubes so they toast consistently rather than burning at the edges
• The covered bake is not optional; it keeps the fruit moist while the crumbs set
• Serve warm for the best contrast between the bubbling fruit and the crunchy top layer

Variations

• Fresh rhubarb: Fresh rhubarb works in place of frozen when it’s in season; taste and adjust sugar as needed since acidity varies
• All-apple: Skip the pie filling and use fresh sliced apples cooked the same way for a from-scratch version