Preheat the Oven: Set your oven to 350°F. Line an 8-inch round pan with parchment paper and grease it.
Beat the Butter: In a large mixing bowl, beat the butter for 30 seconds using a hand mixer or stand mixer with the paddle attachment on medium speed.
Add Sugar: Add the sugar and beat for one minute.
Incorporate the Eggs: Add the eggs one at a time, ensuring each egg is fully mixed in before adding the next. Scrape down the bowl between additions. With the final egg, add the almond and vanilla extracts.
Add Ricotta and Zest: Mix in the ricotta and orange zest on low speed.
Combine Dry Ingredients: Add the almond flour and salt, mixing until fully incorporated.
Prepare for Baking: Once smooth, pour the batter into the prepared pan and spread it out evenly with a spatula.
Add Topping: Sprinkle the top with 1/3 cup of sliced almonds. Gently shake the pan to distribute the almonds evenly.