Preheat the oven to 350 degrees and prepare a loaf pan by spraying it with non stick spray.
Mix together the cake mix, milk, oil, eggs, and cinnamon in a large bowl.
1 (15.25oz) box yellow cake mix, 3/4 cup milk, 1/2 cup vegetable oil, 3 eggs, 1 Tbsp ground cinnamon
After all the ingredients are mixed together, add in the grated apples.
2 apples
Pour the apple cake mixture into the prepared loaf pan.
Sprinkle the streusel topping over the apple cake batter then place in the preheated oven.
Bake the cake for about 50 minutes. When the cake is done insert a toothpick to make sure the cake is done.
After the cake is done cooking, let the cake cool in the pan for 10 minutes then turn it out onto a cooling rack and let the cake finish cooling until it is completely cool.
Serve immediately once cooled enough to slice.
Streusel Topping
In another bowl mix together the melted butter, sugar, brown sugar, and flour. Mix it all together with a fork to form large chunks of streusel topping.
6 Tbsp butter, 1/3 cup sugar, 1/2 cup brown sugar, 1 1/4 cup flour
Notes
Add 1/2 cup of nuts to the batter if you want to add some more texture and flavor. I personally think walnuts pair great with apple desserts like this one.Bake it in a square pan for 35-40 minutes instead of 50 to get more of the look of a cake if you want. Start checking to see if it’s done around 30 minutes.Grate the apples right before using them or they will brown. Apple slices won’t turn out the same in this recipe. If you have to grate them ahead of time, sprinkle them with a little lemon juice to keep them from browning.Store leftover apple streusel cake in an airtight container or cover with plastic wrap. Leave at room temperature for up to three days.