Good question! Here’s what I’d recommend doing if you’d like to make a frozen apple cider margarita: 1. Mix, pour, and freeze everything but the tequila - mix together the apple cider, Grand Marnier, lime juice, and agave, and then pour the mixture into silicone ice cube trays (THESE large ones are excellent for this kind of an application), and freeze. 2. Blend - once the apple cider mixture is completely frozen in the ice cube trays, pop the cubes out, and add them to your blender with the tequila. Blend until smooth! 3. Pour, garnish, and serve - pour the frozen apple cider margaritas into glasses, garnish as desired, and serve!