Pre-Cooking Prep
Preheat oven to 375°F (190°C).
Line a muffin tin with liners or grease well.
In a small bowl, mix plant milk and apple cider vinegar; set aside 5 minutes to create vegan buttermilk.
In another bowl, mix vegan cream cheese, powdered sugar, and vanilla until smooth. Chill filling while preparing batter.
Make the Muffin Batter
In a large bowl, whisk pumpkin purée, oil, brown sugar, and vanilla until smooth.
Stir in vegan buttermilk.
In a separate bowl, whisk flour, baking powder, baking soda, spices, and salt.
Add dry ingredients to wet ingredients and mix just until combined—do not overmix.
Assemble
Fill muffin cups halfway with batter.
Add 1 tablespoon chilled cream cheese filling to the center of each.
Top with more batter until cups are about ¾ full.
Bake
Bake for 20–24 minutes, until muffin tops spring back when touched and a toothpick inserted into the muffin (not the filling) comes out clean.
Cool in the pan for 10 minutes, then transfer to a wire rack.
Doneness & Texture Check
Muffins soft and domed
Edges lightly golden
Filling creamy and set, not melted into the batter