Preheat the oven to 400 F.
Rinse the shrimp under running water and drain. Pat them dry.
Mix the spice mix ingredients together and add to shrimp and mix well. Set aside to marinate for 20 to 30 minutes.
To prepare the avocado crema, place the jalapeños and garlic cloves on a baking sheet. Drizzle with the olive oil and bake for 10-15 minutes until the jalapeños are charred and the garlic is soft. De-stem the jalapeños and peel the garlic and add them to a food processor. Add the lime juice and avocados to the food processor and pulse until smooth. Place the sauce in a bowl and set aside.
Prepare all the toppings (cilantro, cabbage, and red onions) and set aside.
To cook the shrimp, in a large skillet, add 3 tbsp of olive oil and heat it on medium-high heat. Place the shrimp in one layer leaving some room between each shrimp. Sear the shrimp on each side for 2-3 minutes. Remove from the pan and set aside.
Warm your tortillas – we like to warm them up straight on our stovetop – and assemble your tacos. Our preference is to place some cabbage in a tortilla, then two shrimps, some onions and cilantro, then top it off with some avocado crema. Enjoy!