Preheat the oven to 350 degrees F. Line a cupcake pan with paper cupcake liners.
In a large bowl, whisk together the gluten free flour blend, cocoa powder, sugar, baking soda, and salt.
Add the melted vegan buttery spread, water, applesauce, vanilla extract, and vinegar, and mix until smooth and combined. (You can use a mixer, or just do it by hand with a spoon. Either way works).
If the batter seems too thick or dry, add a little more water. Some gluten free flours really soak up the liquid, so adjust the amount if the batter is too hard to stir.
Spoon the batter into the cupcake liners, filling them about ⅔ full.
Bake at 350 degrees F for 19-24 minutes, or until a toothpick inserted inside comes out clean. Allow the cupcakes to cool in the pan before moving them.