Use room temperature limes so the juices melt sugar faster. Slice lime into slices or small chunks and add it to the glass.
Add sugar and muddle, muddle, muddle! The goal is to make sure sugar is melted before adding Cachaca.
Add ice cubes almost to the top and and pour in Cachaca.
Use another larger glass (or a shaker) to pour the mixture back and forth a couple of times to mix.
Notes
Is Cachaca gluten free? - most cachaca spirit is made with pure raw sugar cane and not additives, it is naturally gluten free. Although, there are brands that may have additives in it. Always check the brand and check their website for confirmation.
Muddler - use a flat end muddler to muddle mint. When working with herbs, choose a muddler without ridges and one that is not lacquered. If you don’t have a muddler, use a small wooden spoon or a wooden utensil handle with a flat end.
Limes - use ripe,room temperature limes so the juices melt sugar faster.