In a medium sized bowl, add in the granulated sugar, almond flour, and 4 tablespoons of the unsalted butter. Cream the ingredients together until fluffy and well combined. Then mix in 1 egg, the almond extract, and a pinch of salt.
Evenly distribute the almond filling onto 4 slices of Hawaiian bread. Spread it out into an even layer then sandwich it with the remaining slices of bread. Set aside.
In a dish, whisk together the remaining egg, half and half, vanilla extract, and cinnamon. Mix until well combined. Pour the sliced almonds into a separate shallow dish
Take one of the French toast sandwiches and dip both sides into the egg custard mixture until well coated. Allow any excess liquid to drip off then place it into the dish with the sliced almonds. Coat both sides with sliced almonds. Repeat this process with the remaining French toast sandwiches.
Heat a large pan over medium low to medium heat. Working in batches, add in 1 tablespoons of the remaining unsalted butter and allow it to melt. Place 2 of the French toasts into the pan and cook for about 4-5 minutes on each side until golden brown on the outside and cooked through. Repeat this process to cook the rest of the French toasts. Remove the French toasts from the pan and slice them in half. Top with a dusting of powdered sugar and serve with maple syrup. Enjoy!