Spread ~half of the batter around the bottom of the prepared pan. Sprinkle ~half of the topping so that it evenly covers the batter.
Spread the remaining batter evenly over the topping. Finally, evenly sprinkle the rest of the topping.
Bake in the preheated for 30-35 minutes, until a toothpick comes out clean or with only crumbs.
Once the cake cools (it can still be a bit warm – it’s delish warm or room temp), drizzle the icing over the cake, slice into ~20 pieces, and serve!