Skip to Content

Slow cooker Mexican casserole

Slow cooker Mexican casserole. Huge flavours and a crispy cheesy crust - and no pre-cooking required!

When I first took the lid off my slow cooker, I wasn’t sure if I was going to post about this recipe – it’s not the most attractive dish I’ve ever made, and it turns out it’s really tricky to photograph the inside of a slow cooker. But, then I had a taste and my jaw dropped (not literally, not with a mouthful of food anyway) – this Mexican casserole is one of my favourite things that I’ve ever made in my slow cooker. So please look past its somewhat scruffy appearance and the slightly dodgy photos, and just think about how it tastes!

Slow cooker Mexican casserole. Huge flavours and a crispy cheesy crust - and no pre-cooking required!

The texture of this casserole is actually pretty hard to describe – it’s not quite eggy, not quite bready, not quite spongy… it’s just a fluffy mixture that’s surprisingly filling at the same time. Along with my favourite Mexican-style ingredients (black beans, corn, coriander, jalapeños), it makes an awesome low-effort dinner. As with all of my slow cooker recipes, there’s absolutely no pre-cooking required – literally just add everything to the pot, give it a good mix, and you’re done. Easy peasy.

Slow cooker Mexican casserole. Huge flavours and a crispy cheesy crust - and no pre-cooking required!

The best thing about this casserole is the crust around the edge. You know that weird ‘magic cake’ thing, where you just make one mixture, and as it cooks it separates into three distinct layers? Well, this casserole does a similar thing – the middle stays soft and fluffy, and the edge crisps up to form the perfect cheesy crust. It’s not quite like a quiche (it’s a bit spongier than that because of the flour), but it’s in the same vague family. Second cousins, perhaps. In a way it’s like a healthier way to make a quiche – you still get a crust, but without having to use any pastry.

We served this casserole as a meal in itself, but you could use it as a side dish too – make it a real Mexican feast. Nom nom!

Slow cooker Mexican casserole. Huge flavours and a crispy cheesy crust - and no pre-cooking required!

Print Recipe
3.5 from 2 votes

Slow cooker Mexican casserole

Prep Time10 mins
Cook Time6 hrs
Total Time6 hrs 10 mins
Course: Main meal
Servings: 3
Author: Becca Heyes


  • 25 g butter melted
  • 200 ml milk
  • 2 eggs lightly beaten
  • 4 tbsp plain flour
  • 1 tsp baking powder
  • 1/2 tsp smoked paprika
  • 1/4 tsp hot chilli powder
  • Salt
  • Black pepper
  • 250 g sweetcorn kernels drained
  • 400 g tin black beans 240g when drained, drained and rinsed
  • 10 slices pickled jalapeños I used red, finely chopped
  • 100 g grated cheese I used a mixture of cheddar and mozzarella
  • Fresh coriander chopped, to serve


  • To a fairly small slow cooker (mine's 3.5 litres), add the first 9 ingredients: melted butter, milk, eggs, flour, baking powder, paprika, chilli powder and seasonings. Whisk well until smooth. Then add the corn, black beans, chopped pickled jalapeños, and grated cheese, and mix again.
  • Cook for around 6 hours on medium, until the middle has set and the outside is crispy.
  • Serve topped with fresh coriander if desired.

Slow cooker Mexican casserole. Huge flavours and a crispy cheesy crust - and no pre-cooking required!

Fan of your slow cooker? Try my easy slow cooker saag aloo!

Easy slow cooker saag aloo

Cheesy tomato and avocado toasts
← Previous
Sesame crusted halloumi with Asian slaw
Next →
Recipe Rating


Sunday 14th of April 2019

This was more like a frittata and wasn’t my favourite to be honest. I think it will be better cold, served sliced with a green salad. Ended up with about 3.5 hours on high then another couple of hours on low. 


Wednesday 22nd of November 2017

This recipe sounds yum and I'm thinking of doubling it for my larger slow cooker (and family)! Do you think there will be any problem doing this? I'm new to slow cooking. Many thanks!

Becca @ Amuse Your Bouche

Tuesday 5th of December 2017

I'm not a slow cooking expert either, I think it would be fine in a larger slow cooker, but you might need to reduce the cooking time, as the mixture will form a thinner layer in a larger slow cooker. Fingers crossed!

Mimi Says

Monday 30th of October 2017

I just found your site and tried this recipe yesterday and...absolute success! I've brought in little tubs of it for a couple of my slow-cooking fan co-workers to try. Thank you so much for this yuimmy, easy, cheese-y dish!

Becca @ Amuse Your Bouche

Wednesday 1st of November 2017

Brilliant! So glad it worked out well for you, thanks for the lovely feedback :)


Wednesday 27th of September 2017

In my 3qt-ish crockpot, which only has low/high, it was quite done by 6hrs. Might not have needed that long, it looks quite well done. Unfortunate since I put it in about 10 hours before it was needed, thinking low would take longer than the medium time listed.

I can't say for sure whether it's overdone, or anything for the taste, as dinner isn't for 3 and a half hours.


Saturday 9th of April 2016

I made this for a weekend breakfast and didn't fancy leaving my slow cooker to do the work overnight so I just made us two individual dishes and popped it in a moderate oven for just under an hour then half an hour a bit hotter to make sure the egg was cooked. Didn't fancy cheese so left it out, but could have added an extra egg? I also left out the butter, and my goodness, the whole thing was super delicious. I use prepared coriander puree to reduce wastage and just squeezed a bit in before cooking. I have hot chilli powder and use it all the time, but users should beware it is HOT especially when using another spicy ingredient, like the jalapenos here. Will definitely make again with various off-the-cuff variations! I have pictures of my dish, if you are interested :)

Becca @ Amuse Your Bouche

Monday 11th of April 2016

Sounds yummy, so glad I inspired you! I can never follow a recipe either, even when it's one of my own, so I totally understand the urge to adapt it :) I'd love to see your pictures! It's probably best if you drop them on my Facebook page ( or tag me on Instagram @easycheesyveg