Preheat oven to 300°F. Line a large baking sheet with a silicone baking mat or parchment paper and set aside.
In a large bowl, whisk egg white, vanilla extract, and water until foamy, about 3 minutes. A hand or stand mixer will make quick work of this.
1 egg white, 1 teaspoon vanilla extract, 2 teaspoons water
Fold in almonds and stir until completely coated in egg white mixture.
16 ounces almonds
In a separate medium bowl, whisk together granulated sugar, brown sugar, cinnamon and salt. Pour over the top of the almonds and toss until almonds are completely coated in cinnamon sugar mixture.
½ cup dark brown sugar, ½ cup granulated sugar, 1 to 2 teaspoons ground cinnamon, ½ teaspoon sea salt
Spread the almonds onto the prepared baking in a single layer. Bake for 35 to 40 minutes stirring after the first 15 minutes, then every 10 minutes thereafter until the sugar mixture has hardened.
Remove the candied almonds from the oven and let cool on the baking sheet before transferring to an airtight container.