Step 1

Crush the graham crackers and place the crumbs on a small flat plate. Brush the rim of a cocktail glass with fresh lime juice or simple syrup. Then, roll the edge in the graham cracker crumbs to coat. Set aside.

Step 2

Add the fresh mint leaves and simple syrup to the bottom of a cocktail shaker and muddle.

Step 3

Add the Key lime juice, white rum and heavy cream to the cocktail shaker. Fill it with ice, top it with the lid and shake vigorously for 20 to 30 seconds.

Step 4

Strain the cocktail into the prepared glass and garnish with a sprig of fresh mint leaves. Serve immediately.