Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper and set aside.
In a large bowl, mix the ground almonds, sugar for coating, melted butter, egg whites, vanilla extract, and salt until well combined. If you want to add food coloring or flavorings like coffee powder (for chocolate macaroons), do so at this stage.
Using a cookie scoop or tablespoon, drop spoonfuls of the mixture onto your prepared baking sheet, spacing them about 2 inches apart. Gently roll each ball in the extra sugar to coat completely before placing it on its own spot on the tray. Flatten slightly with the back of a spoon if desired.
Bake for approximately 13-15 minutes or until golden brown around the edges and firm at the bottom (they should still be soft inside when removed). Let them cool completely on the baking sheet to harden, as they will continue setting once off the heat. They can also become crispier if you let them sit for a few hours.
Once cooled or set according to your preference, remove from pan and enjoy.