In blender or food processor, place beets. Cover; blend on high speed about 1 minute, stopping occasionally to scrape sides, until smooth. Pour 1/2 cup beet mixture in large bowl (reserve remaining for another use). Add egg product, sugar, vanilla, oil and yogurt, stirring well to combine. Stir in flour, cocoa, salt, baking powder and baking soda. Divide batter evenly among muffin cups.