Preheat the oven to 325 degrees F (165 degrees C). Spray an 8-inch baking dish with cooking spray.

Spread cranberries into the prepared baking dish and sprinkle with 1/4 cup sugar.

Stir together remaining 1 cup sugar, flour, and melted butter in a large bowl. Whisk eggs in a separate bowl, then stir into sugar-flour mixture until smooth. Pour over cranberries in the baking dish.

Bake in the preheated oven until berries are bubbling and topping is lightly browned, about 1 hour.