Pour the rosé and lemonade into ice cube trays and freeze for at least 6 hours or overnight.
Place all of the rosé cubes and 6 of the lemonade cubes in a 9 cup capacity blender along with frozen strawberries and 2 tablespoons simple syrup. Process until smooth and slushy. Taste and serve as is or add additional lemonade cubes and process again for a less boozy drink. If you'd like a thinner consistency, feel free to pour in a splash or two of lemonade.
Pour into pretty serving glasses and garnish with lemon slices and fresh sliced strawberries.
For a small batch of simple syrup combine 1/4 cup sugar and 1/4 cup water in a small saucepan and place over medium-low heat. Simmer and stir until sugar has completely dissolved. Remove from the heat and allow to cool completely.
1 bottle of rosé will fill one and a half standard size (12-cube) ice cube trays for a total of 18 cubes.
2 cups lemonade fit perfectly into one standard size (12-cube) ice cube tray.
How much lemonade you use is totally up to you and depends on how strong you want the drink. I thought 6 cubes was perfect but you can add all 12 for a less boozy drink.
Make-Ahead Instructions: Follow recipe as directed and then transfer the Frosé to a freezer-proof container with a lid. Freeze overnight. When ready to serve, remove from freezer and allow to sit out for 5 minutes. Stir in a little additional rosé or lemonade to reach desired consistency, if needed.