add the cake mix and pie filling to a mixing bowl and mix with a spoon just until combined (about 3 minutes)
add zest of 1/2 a lemon to the batter and mix until combined (about 1 minute)
spray the baking dish with non stick spray or grease with butter
add the batter into the baking dish and make it even
bake at 350 for 20 minutes
remove from the oven and immediately sprinkle with powdered sugar using a fine mesh strainer (or you can skip this step)
let it cool at least 20 minutes
slice and serve the cake with a dollop of whipped cream and more lemon zest for garnish
Notes
Powdered Sugar: While you are letting the cake rest, sprinkle the powdered sugar over the cake with a fine mesh strainer : https://amzn.to/2XvjeVN
it'll melt into the cake while it's cooling and make it extra delicious
Lemon Zest: zest a whole lemon. Use half in the cake and the other half use as a garnish when you serve each slice.
Serve with: Serve with a dollop of cool whip or whipped cream and add lemon zest over top the whipped cream. Magnificent!
Mix: Mix with a simple spoon. Start in the center of the bowl, making small circles in the middle so the cake mix doesn't get all over the place. As it combines start making larger circles with the spoon until it is all combined! It only takes about 3 minutes to combine.