• To begin, combine the boiling water and oats in a small bowl. Allow this to sit for 30 minutes.
• Preheat your oven to 350°(F).
• Butter a 10-inch cast iron skillet or cake pan. Coat the sides and bottom well. Set it aside for now.
• In a small bowl combine the all-purpose flour, cinnamon, salt. and baking soda. Stir it together and set it aside for now.
• In your mixing bowl, lightly beat the eggs.
• Add in the sugars, melted butter, and vanilla extract. Whisk together.
• Add in the soaked oats and stir together.
• Add in the flour mixture and whisk until combined.
• Spread the batter in your prepared pan.
• Bake the cake for 25-30 minutes, or until it tests done with a wooden skewer/toothpick.
• Allow to cake to cool on a rack.
• When the cake is cooled, prepare the glaze.

Making the Brown Sugar Glaze

• Combine the brown sugar, granulated sugar, butter, and half and half in a small saucepan. Cook and whisk this over medium low heat until it boils and thickens. It will be very foamy. Stir continually.
• Add in the vanilla extract and continue to stir and cook for 1 more minute.
• When the glaze thickens, allow it to cool for about 5 minutes, then drizzle it all over the cake.
• Top the cake with toasted coconut.
• Enjoy!