Generously grease and flour a bundt pan. Set aside.
In a large bowl, beat together all wet ingredients except for the apple.
Beat in the dry ingredients, making sure to spoon and level the flour, don't scoop right from the bag.
Once well combined, fold in the grated apple until well combined.
Transfer to your prepared pan and spread evenly.
Bake for 45-50 minutes (I usually do 48) or until a toothpick comes out clean.
Let cool in the pan for just 15 minutes, then flip onto a cake stand, tapping the bottom lightly as needed to help it slide out more easily.
Let cool completely.
Whisk together all ingredients for the glaze, then pour on top. Slice and enjoy!
I made this into 1 regular bundt cake, but you can also use two 8 or 9 inch round cake pans instead. Decrease the bake time by about 10 minutes, but keep an eye on it and check for doneness around 35 minutes.