Slice the jalapeños into thin rounds, keeping or removing seeds based on your heat preference. I usually leave a few seeds for a noticeable kick without overpowering the drink. Set them aside for infusion.
In a large pitcher, combine tequila, fresh lime juice, and orange liqueur. Stir gently to blend the flavors evenly. I always taste at this stage to ensure the citrus and alcohol balance feels right.
Pour in the agave syrup and stir until fully dissolved. Then add the sliced jalapeños and let them infuse for a few minutes. This step is where the drink develops its signature spicy edge.
Add plenty of ice directly into the pitcher to keep everything cold. Stir again to mix thoroughly and allow the flavors to meld. The chill also slightly tones down the spice for a smoother sip.
Rim your glasses with salt or chili salt, then pour the margarita over ice. Garnish with lime slices or extra jalapeño rounds for a striking presentation. Serve immediately and enjoy.