Center a rack in the oven and preheat the oven to 350°F. Butter a seasoned 9-inch cast-iron skillet or another heavy ovenproof skillet, a 9-inch cake pan or even a pie pan.
Pour the sugar into a medium bowl. Add the zest and blend the zest and sugar together with your fingertips until the sugar is moist and aromatic. (I left out the zest)
Whisk in the eggs one at a time until well blended. Whisk in the salt and the extracts. Switch to a rubber spatula and stir in the flour.
Finally, fold in the melted butter. Scrape the batter into the pan and smooth the top with a rubber spatula. Scatter the sliced almonds over the top and sprinkle with a little sugar. (The recipe says to sprinkle granulated sugar. I chose raw sugar)
Bake the cake for 25 to 30 minutes, or until it is golden and a little crisp on the outside; the inside will remain moist. Remove the pan from the oven and let the cake cool for 5 minutes, then run a thin knife around the sides and bottom of the cake to loosen it. You can serve the cake warm or cooled, directly from the skillet or turned out onto a serving plate.
The nutrition information provided are only estimates based on an online nutritional calculator. This is not a comprehensive list of all the nutrients in the recipe (i.e., does not include vitamins, cholesterol, etc). I am not a certified nutritionist. Please consult a nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.