Preheat the oven to 375 degrees F (190 degrees C). Butter a 9x9-inch glass baking dish.

Combine apples, cranberries, raisins, and walnuts in the prepared baking dish. Sprinkle with 1/4 cup sugar and cinnamon.

Combine remaining 1 cup sugar, flour, butter, egg, baking powder, and salt in a bowl; mix until crumbly. Spread over apple mixture.

Bake in the preheated oven until topping is golden and inside is bubbling, about 50 minutes. Cool 5 to 10 minutes.