Make the brown sugar cold foam. Add the cold foam ingredients to a small container or glass and froth with a milk frother for at least 30 seconds or until doubled in size and foamy. Set aside.
Line a tall glass with caramel sauce, then add the pecan syrup and espresso. Stir gently. Add ice, then top with milk.
Pour the brown cold foam over the pecan latte, then top with crushed maple sugar if desired. Drink up!