Halve the avocados, remove the pits carefully, and scoop the flesh into a mixing bowl before mashing it with a fork. Mash until creamy in places but still pleasantly chunky.

Fold the sour cream into the mashed avocado. The mixture should look smoother and more cohesive without becoming loose.

Dice the tomato and red onion, then mince the garlic, jalapeño, and cilantro before adding them to the bowl. Keep the pieces small so each scoop has a balanced mix of fresh aromatics.

Cut the lime and squeeze juice from one half over the avocado mixture. The lime should smell fresh and bright rather than overpowering.

Stir in the cumin and salt until evenly distributed. The guacamole should turn lightly speckled with cumin and cilantro.

Taste and adjust with more jalapeño, lime juice, or salt as needed. Stop when the richness, citrus, heat, and salt taste balanced to you.

Serve the guacamole immediately. The surface should be vibrant green and thick enough to hold on a sturdy dipper.