Rinse the peanuts with water and drain. In a dry pan, place the 500g peanuts over low heat. Stir constantly to roast evenly for about 10-15 minutes until they turn slightly yellow and fragrant. Avoid high heat to prevent burning.

Once roasted, transfer the peanuts to a well-ventilated area to cool completely. After cooling, gently rub off the skins. You can use a large-holed sieve to sift out the skins.

For a coarser texture, place the peeled peanuts in a clean cloth or towel and lightly crush them using a rolling pin. Aim for a mix of finely and coarsely crushed peanuts.

If using raw sesame seeds, toast 250g white sesame seeds in a dry pan over low heat until they turn golden and aromatic. This should take about 3-5 minutes, stirring frequently. If using pre-roasted seeds, skip this step. Once toasted, add the sesame seeds to the bowl with the peanuts and mix them together evenly.

In a pot, combine 300g brown sugar and 120ml water. Bring to a boil over high heat.

Once boiling, reduce the heat to medium-low and stir continuously to prevent the sugar from sticking to the pot.

As the mixture thickens, add 100g maltose and continue stirring. Keep the heat low to avoid burning the syrup.

Cook until the syrup becomes thick and bubbly. To test if it's ready, dip a chopstick into the syrup; if it forms a thread when lifted, it's done. This process usually takes about 5-10 minutes.

Allow the sugar syrup to cool for about 1-2 minutes. This step is crucial to avoid cooking the peanuts, which can release oil and affect the texture.

Quickly add the prepared peanuts and toasted sesame seeds to the syrup. Use a spatula or chopsticks to mix everything thoroughly, ensuring the peanuts and sesame seeds are evenly coated with the syrup.

Pour the mixture into a prepared mold lined with baking paper (a square or rectangular pan works well). Press down firmly with a spoon or rolling pin to level the surface and create an even thickness.

Allow the brittle to cool and set completely at room temperature for about 1 hour.

Once the sesame peanut brittle has fully hardened, carefully remove it from the mold.

Use a sharp knife to cut the brittle into even pieces, typically squares or rectangles of about 2-3 cm in size.