Add chopped pecans and chestnuts to a medium saucepan and roast on low/medium heat for 5 minutes. Stir often to ensure the pecans and chestnuts roast evenly.
Slowly add in the water, and be careful because the saucepan will be hot. Add in the brown sugar and granulated sugar. Stir ingredients together and increase the stovetop heat to medium
Bring the saucepan to a boil, then reduce heat to low and simmer for 10 minutes. Continue to occasionally stir to heat evenly.
Turn off stovetop heat and move the saucepan. Carefully add in the vanilla extract, and stir so it is evenly distributed.
You can either scoop out the nuts or strain them out (you can use 90 grade cheesecloth to strain). Set the nuts to the side*
Allow the syrup to cool for 5-10 minutes, now we can start making the chestnut praline latte.
Brew two shots of espresso and pour into your Chosen Mug
Add 2-3 tbsp of chestnut praline syrup to you Chosen Mug. You can store the extra leftover syrup in an airtight container in the fridge for 2-3 weeks.
Steam 1 cup (8 oz) of milk or non-dairy alternative by using steamer/frother or heat in small saucepan until it is steaming but not boiling.
Pour steamed/frothed milk into your Chosen Mug, and mix/stir everything together.
Add optional whipped cream