Place the fresh or frozen berries into your blender first. Then add the simple syrup, margarita mix and ice cubes over top.
Start the blender and blend until the ingredients are well combined and have a consistent slushy texture. If the blender gets stuck, add water in ¼ cup increments.
Grab the glasses that you want to use and split the frozen strawberry daiquiri between cups.
Garnish with a lime wedge and a fresh strawberry slice.
Notes
Make your own margarita mix: Mix 2 cups lime juice with 2 cups simple syrup (made with 1 cup sugar dissolved in 1 cup water). Make just enough for this recipe: Combine 4 ounces lime juice and 4 ounces simple syrup. No simple syrup? Add 1 cup sugar and 1 cup water to the blender with everything else.