Prep: Preheat your oven to 140°C/120°C fan/275°F/Gas 1 and line a large baking tray with baking paper.
Make the flavoured sugar: In a small bowl, mix together 50 g of Granulated sugar, 50 g of Light brown sugar and 1 teaspoon of Ground cinnamon until combined.
Mix the liquids: In another bowl, whisk together 1 Egg white, 1 teaspoon of Cold water and 1 teaspoon of Vanilla extract until frothy. You don't need to whisk it into stiff peaks.
Coat the almonds: Put 340 g of Almonds into a large mixing bowl and pour over the egg white mixture. Stir until all the almonds are coated.
Add the sugar: Add the cinnamon sugar mixture and stir well, making sure every almond has an even coating.
Roast the almonds: Spread the almonds over the lined baking tray in a single layer. Roast for approximately one hour, stirring at 20 and 40 minutes, until the coating looks dry and the almonds are toasted.
Cool: Leave to cool completely on the tray, where the coating will become crisp.
Notes
Use raw almonds- Already roasted almonds can become overcooked or bitter when roasted for a second time.
Whisk until frothy - This helps the egg white coat the almonds evenly so the cinnamon sugar sticks.
Spread them out - Keep the almonds in a single layer on a large baking tray. If you're making a double batch, use two trays rather than overcrowding one.
Stir regularly - Turn the almonds during roasting and spread them back into an even layer for consistent cooking.
Don't skip cooling - The almonds will be very hot when they come out of the oven, and the coating becomes crunchier as they cool.
Adjust the cinnamon - Add a little extra if you prefer a stronger cinnamon flavour.
Try other nuts - Pecans are a lovely alternative, but start checking them earlier as different nuts may roast at different rates.