Preheat oven to 250 degrees.
Mix the sugar, flour, salt, baking powder, and cocoa in a mixing bowl.
Separately lightly beat the eggs and add oil and butter. Mix into flour mixture just until blended.
Mix in beets and vanilla.
Divide into 24 greased muffin tins.
Bake for approximately 20 minutes or until a toothpick inserted at the center comes out clean.