Add almonds, sugar, vanilla powder, and water to a wide nonstick pan. Set over medium heat.
Stir occasionally until the mixture boils and the sugar dissolves completely. Lower the heat slightly if it gets too bubbly.
Continue stirring. As the water evaporates, the sugar will turn grainy and coat the almonds.
Keep stirring over medium-low heat until the sugar becomes dry and sandy, and the almonds smell toasted (about 2–3 more minutes). As soon as the sugar starts to melt, remove from heat.
Transfer to a parchment-lined tray, separating almonds with a spatula.
Let cool completely, then enjoy or store in airtight jars.
Video
Notes
Use a large pan so the almonds cook evenly.
For darker caramelized almonds, continue cooking a minute longer — but watch carefully to avoid burning.
If the sugar melts completely and turns brown, you won't get the sandy effect anymore, but transfer immediately to parchment paper for delicious caramelized almonds, or transfer to a lined pan to get Croccante.