01 - Combine strawberries, sugar, and water in a small saucepan or microwave-safe bowl. Heat gently for 2-3 minutes until strawberries soften and release their juices. Let cool completely, then blend until smooth. Strain through a fine-mesh sieve if you prefer a seedless puree.
02 - In a cocktail shaker or large glass, combine the cooled strawberry puree, cold milk, and heavy cream. Stir vigorously until fully incorporated and smooth.
03 - Divide ice cubes evenly between two tall glasses. Pour the strawberry cream mixture over the ice, distributing equally between glasses.
04 - Slowly pour the cold brewed coffee over the back of a spoon into each glass to create a beautiful marbled effect. Do not stir to maintain the layered presentation.
05 - Top with whipped cream if desired and garnish with fresh strawberry slices. Serve immediately while cold and refreshing.