Oven & Pan Prep: Set your oven to preheat to 300°F (150°C). Line a heavy-duty half-sheet pan with parchment paper to prevent sticking.
Aerate the Egg Whites: In a large mixing bowl, use an electric hand mixer on medium speed to beat the two egg whites and the almond extract. Continue for 1-2 minutes, just until the mixture is light, white, and frothy.
Combine Spice & Sugars: In a separate large bowl, thoroughly whisk together the granulated sugar, light brown sugar, ground cinnamon, ground nutmeg, and fine sea salt until uniform.
Initial Almond Coating: Add the raw almonds to the frothy egg white mixture. Use a silicone spatula to fold and stir, ensuring every almond is evenly glossed with the foam.
Dredge with Spice Mix: Pour the sugar and spice mixture over the coated almonds. Continue to fold and stir until the dry ingredients cling to the almonds, forming a thick, even crust.
The First Bake: Spread the coated almonds in a single, even layer on the prepared half-sheet pan. Bake for 20 minutes in the preheated oven.
Low & Slow Finish: Remove the pan from the oven and use the spatula to gently stir the almonds, redistributing them for even cooking. Reduce the oven temperature to 225°F (110°C). Return the pan to the oven and continue baking for 45 minutes, or until the coating is dry to the touch and the almonds are a deep golden brown.
Cool & Crisp: Let the almonds cool completely on the pan set over a wire rack. They will become wonderfully crisp as they reach room temperature. Gently break apart any clusters that have formed before serving or storing.