In a stand mixer, beat the butter and eggs on medium speed for 1 minute. Add both sugars and vanilla, mixing until light and creamy. On low speed, gradually add half the flour, followed by the soaked oats, and finish with the remaining flour. Mix just until combined.
Step 4: Bake the Cake
Pour the batter into the prepared pan. Bake for 30–35 minutes, or until a toothpick inserted in the center comes out clean.
Step 5: Make the Coconut Topping
While the cake is still hot, combine the brown sugar, half & half, and butter in a saucepan over medium heat. Bring to a boil, then remove from heat and stir in the shredded coconut.
Step 6: Broil for Finish
Spread the coconut mixture evenly over the hot cake. Place under the broiler for about 1 minute, keeping a close eye on it. Once the topping bubbles and turns golden, remove immediately—broiled coconut goes from perfect to burnt in seconds!
