Spread the pecans on a baking sheet and toast them in a toaster or oven at 350°F (175°C) for about 8 minutes, until fragrant and lightly golden.
Add the pumpkin puree, almond milk, maple syrup, cinnamon, nutmeg, and clove into your blender and secure the lid.
Blend on high speed until the mixture is smooth, creamy, and evenly combined, about 30–45 seconds. You should notice the mixture is thick and velvety.
Finely chop the toasted pecans and add them into the blender for extra texture and flavor.
Give the mixture a quick pulse to incorporate the chopped pecans without fully blending them—this adds a delightful crunch.
Pour the smoothie into glasses and garnish with additional pecans or a sprinkle of cinnamon if desired.