Using your 10.25” Cast Iron Skillet, smear 1-2 tablespoons of butter all on the inside of the skillet where you’ll be pouring your cake batter once you’ve created it. I smear butter all the way to the edge of the skillet. This will be your non-stick in the making. Keep the “smearing” butter (about 1-2 tablespoons) separate from your icing butter (about 2 tablespoons). BE SURE TO Leave the icing’s 2 tablespoons of butter out to soften and get to “room temperature.” You’ll need this soft butter for the icing later.
Preheat Oven to 350°F / 177°C.
You see that “1 cup granulated sugar?” That’s a lot of sugar, right? But, this is a desert so don’t skimp out on me. Here’s a trick: AFTER YOU SMEARED THE BUTTER TO THE INSIDE SKILLET SURFACE, pour in the entire cup of sugar into the buttered skillet. Hold it with two hands and rotate it all about to spread the sugar into the butter. The sugar will create a “floured” surface to pour your cake batter into. But, DON’T THROW THE REST OF THAT CUP OF SUGAR OUT. There will be a lot of sugar left; pour that in with the dry ingredients. That will go into the cake!
Mix all the dry stuff in a large bowl and sift together: 1 ½ cups flour, the remaining portion of the 1 cup sugar (remember there’s sugar all in the cast iron skillet sticking to the butter coating), ½ tsp baking soda, ½ tsp salt, ½ tsp cinnamon, and mix in the ¾ cups of nuts.
In another bowl, scramble the 2 eggs up real good.
Mash and measure your bananas (eat the rest…there’s always “the rest”)
Mix all the wet stuff in with the eggs: ½ cup crushed pineapple, 1 tsp. vanilla, ½ cups oil, and the 1 cup mashed ripe bananas (about 2 bananas).
Now we’re making magic. Mix your wet and dry ingredients together.
Pour your batter over into your buttered and sugared 10.25” skillet.
Place the skillet in the oven at 350°F / 177°C. We’re baking for 45-60 minutes or until a toothpick inserted into the center of the cake comes out clean. If you peek, you’ll see the cake “cooking” from the outside towards the center and is a light tan color. Eventually it will start to brown...we’re getting close!
Once the cake is done, pull it from the oven and let the cake rest for about 10-20 minutes. This will cause it to shrink and “pull away” from the skillet. If you try to pull it out too soon, it’ll break. Give it a bit of resting time while you finish up that (or pour another) beer.
After it’s cooled for about 10 minutes (not more than 20 minutes), run a spatula (or equivalent) around the edge of the skillet between the cake’s edge and the skillet rim to “loosen the cake.” The big question: will it stick and break? Just tossing it out onto a cooling rack may cause breakage due to the motion and less likely due to stickage.
With the skillet sitting normally, place a cooling rack or a plate over the top of the skillet. Using both hands (that skillet will still be hot), turn the skillet upside down and the cake should just lay out onto the cooling rack or the plate.
Let the cake cool to a “warm temperature.” Unless you want to eat it hot and steaming (it’s delicious that way too especially with some ice cream on top as the ice cream melts and blends with the cake).