Begin by chilling your champagne flutes in the refrigerator for about 10 minutes.
In a measuring cup, combine 1 ½ cups of cranberry juice and ½ cup of orange juice. Stir gently to mix.
Pour the cranberry and orange juice mixture into the chilled champagne flutes, filling each flute about halfway.
Top off each flute with 1 ½ cups of champagne or sparkling wine, pouring slowly to avoid overflow.
Garnish each mimosa with a few fresh cranberries and an orange slice on the rim of the glass.
Serve immediately and enjoy!
For a sweeter beverage, consider using cranberry cocktail juice instead of pure cranberry juice.
You can mix the juices in advance but wait to add the champagne until just before serving to keep it bubbly.
Adjust the ratio of juice to champagne based on your taste preference; feel free to experiment!
Consider making a non-alcoholic version by substituting the champagne with sparkling water or soda.