Combine all ingredients in a blender and pulse until ice is crushed and mixture is combined. Add more ice if needed, then taste and add a little extra rum if desired.
mint simple syrup
Add all ingredients to a small saucepan and heat over medium heat just until it bubbles, stirring constantly until sugar dissolves. Turn heat down to low for 2 minutes, then remove and let sit to cool for 15 to 20 minutes.
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