Preparation:

Preheat oven to 350°F. Coat a 8×4-inch loaf pan with cooking spray. Set aside.
Whisk flour, baking powder, baking soda, salt and cinnamon together in an large bowl. In a separate bowl, beat butter and sugar for 2 minutes or until pale in color and just fluffy. Add 1 teaspoon vanilla and egg and beat until well mixed. Add ⅓ flour mixture to wet ingredients and mix until just combined. Add ½ buttermilk and beat until incorporated. Add ⅓ of flour mixture and remaining buttermilk, slowly mixing until combined. Beat in last ⅓ of flour mixture until batter is mixed. Gently fold in diced apples until well combined.
Pour batter into prepared loaf pan. Bake for 45-60 minutes or until a cake tester inserted into middle of loaf comes out clean.
Cool directly in pan for 10 minutes then carefully remove loaf from pan to finish cooling on a wire rack.
Once cake has completely cooled, mix powdered sugar, 1 teaspoon vanilla, and slowly add buttermilk until frosting reaches desired consistency. Drizzle frosting over cooled cake. Slice to serve.
Recipe adapted from Pinch My Salt.

1 hour 30 minutes, + cooling time to prepare serves 8-12

ENJOY!