Chicken
Southwest Chicken Fajitas
Smoky fajita chicken with peppers and onions. Made without MSG.

Fajitas are usually a fast, hot, high-heat dish — which is exactly the opposite of what a slow cooker does. So this version doesn't pretend to be seared. It's tender, saucy fajita chicken that you pile into a tortilla, and it's genuinely better for a crowd than the skillet version.
The peppers and onions go in at the start here, not the end. You want them soft and sweet, the way they are after twenty minutes on a flat top, not crunchy.
This is also one of only three chicken recipes we make without MSG, which is worth knowing if that matters to your table.
Why you'll love it
Made without MSG.
One of three in the chicken line.
Feeds a crowd without a hot pan.
No standing over a skillet while everyone waits.
Everyone builds their own.
Set out tortillas and toppings and step back.
Works as tacos, bowls or salad.
Same chicken, three completely different dinners.
What's already in the packet
Chili and cumin forward with smoked paprika, and just enough milk powder to soften the edges. No MSG.
Choose your setting
LOW · 5–6 hours
Low and slow gives collagen time to melt and flavors time to build. It is the setting this recipe was written for.
HIGH · 2½–3 hours
For when you started late. It gets dinner done, but the texture is better on LOW.
Done at 165°F
Strips heat fast. Check early so they don't overcook.
You'll Need
- 2 lbs Chicken strips (pick one below)
- 1 cup Water or chicken broth
- 1 packet Cook SLO Southwest Chicken Fajitas
- 3 cups Bell peppers and onion, sliced
Pick your chicken
2 lbs
Chicken breasts, in strips
2 lbs
Chicken thighs, in strips
2 lbs
Chicken tenderloins
Cook chicken to 165°F
Add vegetables
Sliced onion (fresh or frozen) at the start, on the bottom; Mixed bell peppers (fresh or frozen) and diced tomatoes at the start; mushrooms at the start to melt into the sauce, or the last two hours to keep their shape; canned black beans at the start, or the last hour if you want them whole; canned corn in the last thirty minutes.
When to add what
| When | Add | Why |
|---|---|---|
| At the start, on the bottom | Sliced onion (fresh or frozen) | Root vegetables cook slower than meat. They belong closest to the heat, and they hold the meat up out of the liquid. Cut everything an inch and a half or larger — smaller pieces disintegrate. |
| At the start, to soften into the sauce | Mixed bell peppers (fresh or frozen)Diced tomatoes | These break down and give their flavour to the pot. Right for a gravy or a fajita, wrong if you want them to hold their shape. |
| At the start, or the last two hours | Sliced mushrooms (fresh or frozen) | Mushrooms are a choice. At the start they melt into the sauce and deepen it. In the last two hours they hold their shape and keep some bite. |
| Canned beans, drained and rinsed | Canned black beans | At the start for chili and stews, where they take on the seasoning and a few break down to thicken the pot. In the last hour if you want them whole. |
| Canned corn and hominy, drained | Canned corn | Last 30 minutes. Fully cooked already, so anything longer turns it to mush. |
Two ways to do this
If you're home
Follow the timing table above and add things when they're due.
If you're out all day
Put in at the start as normal: sliced onion (fresh or frozen), Mixed bell peppers (fresh or frozen), diced tomatoes, sliced mushrooms (fresh or frozen) and canned black beans. These need the full cook anyway.
Add canned corn when you walk in the door. Forty-five minutes to an hour on LOW is enough for all of it, and it will taste better than if it had cooked all day.
If you would rather not touch it at all, put everything in at the start and use frozen where you can. It will be softer than the timing above intends and the greens will lose their colour, but it will taste good and dinner is ready when you walk in.
Frozen is the better choice for a long day. Already cut, holds its shape better than fresh over eight or nine hours, and goes in straight from the bag with no thawing. Frozen diced onion and pepper strips remove the only real prep this recipe has.
Beans — use canned
Every recipe in this book that uses beans uses canned beans. Drain and rinse them, and they are ready to go. Do not substitute dry beans.
Canned beans are fully cooked during canning, so they are safe and they only need warming through. Dry red kidney beans are a different matter: raw, they contain a lectin called phytohaemagglutinin, and the FDA is explicit that a slow cooker does not get hot enough to destroy it. The toxin needs boiling at 212°F for at least ten minutes, and a crock pot on LOW often reaches only about 167°F — hot enough to soften the bean, not hot enough to make it safe. As few as four or five undercooked kidney beans can cause severe vomiting within a few hours. Canned beans have none of this problem.
| Canned beans | Drain and rinse | Rinsing removes the starchy canning liquid, which otherwise clouds a soup and dulls the flavour. |
| When to add them | Start, or the last hour | At the start for chili and stews — they take on the seasoning and a few break down, which thickens the pot. In the last hour if you want them to hold their shape. |
| Canned baked or refried beans | Last 30 minutes | Already sweetened or seasoned. Added early they scorch against the crock wall. |
| Dry beans of any kind | Not in this book | If you want the savings, cook them fully on the stove first — soak five hours, drain, boil thirty minutes in fresh water — then use them in place of canned. Two cups cooked equals roughly one 15-ounce can. |
One 15-ounce can drained gives about one and a half cups of beans. Most recipes here want one or two cans.
A can of black beans, drained and rinsed, at the start. They soak up the chili and cumin and add substance without changing what the dish is. Lift them out with the peppers using a slotted spoon so the tortillas stay dry.
Corn
| Canned corn | Last 30 minutes | Drain first. It is fully cooked already, so it only needs heating — added early it goes to mush. |
| Canned fire-roasted corn | Last 30 minutes | Same timing. Worth seeking out for the smoky note, especially in chili and anything southwest. |
| Canned hominy | Last 30 minutes | Drain and rinse. Bigger and chewier than corn, and what turns a pork stew into posole. |
Before anything goes in the pot
- 1
Brown the meat first
Pat it dry, get a heavy pan properly hot, and work in two batches so nothing steams. Two to three minutes a side. You want colour, not doneness — the crock pot finishes it.
- 2
Deglaze the pan and pour it in
This is the step almost everyone skips, and it wastes half the benefit of browning. Most of the flavour you just made is stuck to the pan. Pour a cup of the recipe's water into the hot empty pan, scrape everything loose with a wooden spoon while it bubbles, and pour that into the crock pot. Count it toward the total liquid.
- 3
Whisk the packet into the water before it goes in
Do not sprinkle dry powder onto liquid in the pot. Put the 1 cup in a jug, add the packet, whisk until there are no lumps, then pour it over. Cheese and cream powders dissolve properly this way and the sauce comes out smooth instead of grainy.
These happen outside the crock pot, before it's switched on.
Tonight's Plan
- 1
Put the chicken strips in the crock pot.
Strips, not whole breasts. This dish isn't shredded.
- 2
Add the sliced peppers and onion on top.
Three cups sounds like a lot. They cook down to about half.
- 3
Pour in the 1 cup of whisked liquid and stir once.
You dissolved the packet in the water already, so there is no powder to work in and no risk of lumps. One stir to settle everything.
- 4
Stir once and put the lid on.
One stir is enough to distribute the spice.
Vegetables
Stir well, then lift the meat and peppers out with a slotted spoon.
This is the important part. Draining prevents soggy tortillas.
Pile into warm tortillas.
Warm them for 15 seconds so they fold instead of cracking.
Stirring
Stir once at the halfway point and turn the pieces over
There is very little liquid here and a lot of sugar, so the bottom catches. Turning the meat also brings glaze back up onto the top, where it belongs.
Swaps and add-ins
Make it a burrito bowl.
Over cilantro-lime rice with beans, corn and avocado.
Add a can of green chiles.
At the start. More depth, still no real heat.
Use it for quesadillas.
Between tortillas with jack cheese in a hot dry pan.
Add black beans and corn.
At the start. Turns it into a fuller one-pot meal.
Tips for success
- Use a slotted spoon. The single tip that matters here. Liquid in a tortilla means a tortilla on the floor.
- Warm the tortillas. Fifteen seconds in a dry pan or wrapped in a damp towel in the microwave. Cold tortillas crack.
- Cut the chicken before cooking, not after. Strips hold their shape. Trying to slice cooked slow-cooker chicken just shreds it.
- Drop in a liner before anything else. Smooth it against the sides and fold the edges over the rim. When you're done, lift it out and throw it away — the crock never needs scrubbing.
Finish it right
Fresh lime, squeezed hard.
Fajitas without lime aren't fajitas. This is the most important finish in the book.
Chopped cilantro and raw white onion.
Street-taco style. Sharp and fresh against the soft cooked peppers.
Sliced avocado or a spoon of guacamole.
Cool and creamy against the smoke.
Serve it over
Tomorrow night
Fajita quesadillas.
With jack cheese in a hot dry pan until crisp.
Southwest salad.
Cold over greens with corn, black beans and lime vinaigrette.
Fajita breakfast hash.
Fried with potatoes and topped with an egg.
Stuffed peppers.
Fill halved peppers with the chicken and rice, top with cheese, bake.
Keeping it
Fridge
Airtight, up to 4 days
Freezer
3 months. Peppers soften further but flavor holds.
Reheating
Hot skillet is much better than microwave — it drives off liquid and concentrates flavor.
Questions people ask
Recipe card
Southwest Chicken Fajitas
You'll Need
- 2 lbs Chicken strips (pick one below)
- 1 cup Water or chicken broth
- 1 packet Cook SLO Southwest Chicken Fajitas
- 3 cups Bell peppers and onion, sliced
Tonight's Plan
- Put the chicken strips in the crock pot.
- Add the sliced peppers and onion on top.
- Pour in the 1 cup of whisked liquid and stir once.
- Stir once and put the lid on.
Contains milk.
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