Step 1

First, make the guacamole by mashing the avocado in a bowl with jalapeños, tomatoes, garlic, lime juice, and salt. Taste and adjust the salt if needed.

Step 2

For the sincronizadas, in a skillet heated on medium-low, melt ½ tablespoon of the butter. Add a tortilla and layer over the entire surface in this order: ¼ cup of the cheese, ¼ of the sliced ham, 2 tablespoons of guacamole, and another ¼ cup of the cheese. Top with another tortilla.

Step 3

After the cheese has melted and the 2 tortillas are beginning to stick, flip the sincronizada and cook for a couple more minutes or until the bottom tortilla is toasted. Remove the sincronizada and cover with foil to keep warm. Repeat the process for the remaining tortillas and filling.

Step 4

Cut into wedges and serve warm with remaining guacamole and sour cream.