Preheat the oven to 350°F. Line a 9x9-inch light colored nonstick pan with parchment paper and set aside.
In a large mixing bowl, whisk together the dry ingredients.
2 1/4 cup all purpose flour, spooned and leveled, 1 1/2 tsp. baking soda, 1 tsp. salt, 1 tsp. ground cinnamon, 1/2 tsp. ground ginger, 1/2 tsp. ground nutmeg, 1/2 tsp. ground allspice, 1/8 tsp. ground cloves
In another mixing bowl, whisk together the wet ingredients.
2/3 cup vegetable oil, 2 large eggs, room temperature, 3/4 cup brown sugar, packed (light or dark), 1/2 cup sour cream, room temperature, 1 tsp. pure vanilla extract, 3/4 cup granulated sugar
Pour the wet ingredients into the dry and fold just until combined.
Fold in the grated apples.
2-3 large honey crispy apples, grated using the large holes on a box grater, ~1 1/2 cups (can keep the skin on)
Turn out the cake batter into the prepared pan.
Bake for 35-40 minutes or until a toothpick in the center comes out clean. Allow to cool in pan for 10 minutes, then remove to a wire rack.
To make the brown sugar icing, melt the butter, brown sugar and heavy cream in a medium sized saucepan over medium heat. Whisk until mixture is combined and comes to a gentle boil.
1/4 cup salted butter, 1/2 cup dark brown sugar, packed, 2 Tbsp. heavy cream
Remove from heat and whisk in the vanilla and powdered sugar.
1/2 tsp. pure vanilla extract, 1 cup powdered sugar, sifted
Pour the icing on top of cake. The cake doesn’t need to completely cool, when it's still a little warm, the icing melts into the cake.
Slice and enjoy warm!