Add pineapple, ice, jalapeño slices, tequila, grande mariner, and juice from one lime into the blender. Blend until smooth

Rim glasses with lime wedge. Place tajin onto a plate and dip the lime coated rim into the tajin, roating in a circle to coat glasses rim

Pour spicy pineapple margarita into glasses and garnish with an extra jalapeño slice and pineapple

Optional: depending on the pineapple’s sweetness level and your preference, you may want to add a splash of agave syrup