- Preheat the oven to 170°C (340°F). Spread the hazelnuts and almonds out on a baking sheet. Roast them for 20-30 minutes.  
- Add the sugar to a saucepan on medium heat to create a caramel. Let the sugar melt until it has a golden caramel color, but not too dark.  
- Add the, still warm, nuts to the pan with the caramel and mix to evenly coat the nuts.  
- The sugar will recrystallize. Keep the pan on the heat and let the sugar melt once more, stirring occasionally. 
- Once the caramel has remelted, dump the entire mixture out onto a sheet of parchment paper and let cool completely.  
- Once the caramel has cooled, break it up into smaller pieces and transfer to a food processor fitted with the blade.  
- Turn on the food processor and let it run until it turns into a liquid paste, scrapping down the sides occasionally. This can take anywhere from 5-15 minutes depending on your food processor.  
- Transfer to a container and store somewhere dark, like the back of your pantry, until needed.