One serving:

• 1.5 limes (cubed)
• 1/4-1/2 cup of cachaca
• Optional: 1/8 cup of triple sec (or orange liquor) – half the amount of cachaca
• Ice cubes (~3-4 per glass)
• 2 table spoons of sugar

Muddle the limes, add sugar, muddle more. Poor liquids, stir, add ice.