Step 1

Preheat oven to 350°F. Grease a 13x9 inch baking dish.

Step 2

Place the cake mix, instant pudding, 4 eggs, vegetable oil, and 7Up in a large bowl. Whisk until ingredients are combined.

Step 3

Pour the mixture into the prepared pan. Bake for 40–45 minutes, or until a toothpick inserted into the center comes out clean.

Step 4

In a medium saucepan, whisk together the flour, sugar, and pineapple + its juices. Place over medium heat.

Step 5

Bring to a simmer, then add the eggs and melted butter, whisking constantly so the eggs don’t scramble. Cook for an additional 2–3 minutes, or until thickened. Stir in the coconut.

Step 6

Pour the frosting over the still-warm cake, and let cool completely before slicing. The frosting will firm up as it cools.