Boil about three times the amount of water as your mug will hold and measure out 20 grams of fresh coffee beans.
Place 1 TBSP of sweetened condensed milk in a mug.
Grind the coffee beans finely so they look like powder and form a flat surface when you push your finger into them.
Place a paper filter in the filter holder of an Aeropress and pour boiling water over it to rinse it.
Put the plunger in the chamber and pull it as far out as possible without breaking the seal. Place the entire thing upside down, plunger first.
Add the ground coffee and 1/4 tsp cinnamon to the chamber.
Slowly pour 50 grams of water in (to bloom the coffee beans, let gasses escape) and wait 30 seconds.
Pour 200 grams more water into the chamber and wait 15 seconds. Screw the filter holder (with a wet filter inside) onto the chamber and flip it onto your mug (with the condensed milk at the bottom).
Push down on the plunger until you feel a lot of resistance and pause while still maintaining some pressure. Wait 2 or 3 seconds and repeat until you reach the bed of coffee beans or hear a hiss.
Remove the Aeropress, unscrew the filter holder and pull out the plunger. This will make your Aeropress last longer.
Stir the condensed milk and coffee together and enjoy!