Prime Rib Tacos | Leftover Prime Rib Recipe | Life's Ambrosia (2024)

Prime Rib Tacos are the best way to use leftover prime rib. With avocado horseradish sauce and caramelized onions they are taco perfection.

Prime rib is one of those meals that just begs to be made for a special occasion. Like Christmas dinner. But what do you do with the leftovers?If you are asking yourself that question, you’ve reached the right recipe post because I am going to tell you exactly what to do with your leftover prime rib.

MAKE TACOS!

Because Tacos.

But not just any tacos, mind you, Prime Rib Tacos with Avocado Horseradish Sauce. Sounds fancy right? It’s not. It’s totally easy. And with a few steps you can wow your family with your ability to turn your leftovers into another show stopping meal.

Let’s talk about what you need:

What you need:

LEFTOVER PRIME RIB: I like to slice it thin, or you could dice it into small pieces similar to carne asada.

TORTILLAS: Corn work best!

YELLOW ONIONS AND GARLIC: Sliced thin as well. Sautéed they go perfectly with these tacos!

Now we all know that horseradish cream sauce is a must when making Prime Rib, so I figured these tacos needed to have some horseradish too. But with a latin twist. Whether you want to call it Avocado Horseradish Sauce or Horseradish guacamole, this stuff is amazeballs. To make it you’ll need:

AVOCADO

GARLIC

LEMON JUICE: The lemon juice does double duty here. First, it adds brightness to the avocado and it also keeps it from oxidizing and turning brown.

PREPARED HORSERADISH: You can find this in the condiment aisle of your grocery store. Keep in mind, prepared horseradish is different than the creamy horseradish sauce. Beaver’s Prepared Hot Horseradish (affiliate link) is my go-to brand.

SALT

How do you make prime rib tacos?

Like most taco recipes, this one is easy too!

STEP #1: Start by preparing the avocado horseradish sauce. Place avocado, garlic, lemon juice, horseradish and salt together in a food processor. Process until smooth. Transfer to a bowl, cover and refrigerate while you prepare the tacos.

DES’ TIP:I use a mini 3.5 cup food processor (affiliate link)for this. If the food processor is too big, it won’t blend this enough unless you double the batch. You can also use a potato masher to mash it together for a chunkier version.

STEP #2: Heat olive oil in a skillet over medium heat. Cook onions until softened, about 3 minutes. Stir in garlic and sliced prime rib. Cook just until the prime rib is warmed through. Transfer to a plate, cover with aluminum foil to keep warm.

STEP #3: In the same skillet you cooked the meat, heat a thin layer of oil. Fry a taco shell, 30 seconds on each side and transfer to a paper towel lined plate. Repeat with remaining taco shells.

STEP #4: To assemble a taco, place a spoonful of prime rib mixture in the middle of a shell. Spoon avocado sauce on top. Sprinkle with cilantro. Repeat with remaining ingredients. Serve.

If I’m being honest, while the prime rib is great (duh) it’s the sauce that totally steals the show! It also makes it not *super* kid friendly since the horseradish gives it a little kick. I just gave my kiddos regular guacamole and all was right!

Can’t get enough tacos? Welcome to the club! Here are some of my most popular taco recipes:

Shrimp Tacos with Cilantro Cream Sauce

Fish Tacos with Spicy Slaw

Baked Chorizo Tacos

Seasoned Taco Meat

Shredded Beef Taquitos

If you’re looking for more Beef recipes check these out!

Garlic Butter Steak Bites

Flat Iron Steak with Balsamic Sauce

Dutch Oven Pot Roast

Instant Pot Chili

French Dip Sandwich

Beef Stew with Red Wine

Note: This recipe was originally posted in 2014. It was updated with new photos and nutrition facts in 2020.