Mix the coffee and pumpkin spice syrup. Add the freshly-brewed hot espresso, pumpkin purée, maple syrup, vanilla extract, pumpkin pie spice, and salt to a large mug. Briefly stir to combine until the mixture is smooth.
Heat the milk. Heat and froth the milk until it is very hot (but not boiling) using a milk frother or an alternative frothing method. (Or you can skip the frothing step altogether.) Immediately pour the hot milk into the coffee mixture.
Serve. Serve immediately, topped with whipped cream and/or a pinch of pumpkin pie spice if desired, and enjoy!
Notes
Large-batch pumpkin spice syrup recipe (6 servings): Combine 1/3 cup pumpkin purée, 1/4 cup maple syrup, 1 tablespoon vanilla extract, 1 1/2 teaspoons pumpkin pie spice and 3/4 teaspoon fine sea salt in a jar and whisk until evenly combined. Refrigerate in a sealed container for up to 1 week. You will need 2 scant tablespoons of the syrup mixture per latte. Combine with the pumpkin spice syrup with the milk and espresso as directed above.Espresso/coffee: Starbucks' pumpkin spice latte that is similarly sized (a 12-ounce "tall") typically contains just 1 shot of espresso. I prefer two to really bring out the coffee flavor, but feel free to use however much espresso (or very strongly-brewed coffee) that you prefer.Sweetener: Feel free to use any other sweetener that you prefer in place of maple syrup, adding more or less if needed to taste.Source: Recipe inspired by the famous Starbucks pumpkin spice latte.