My Roast Chicken & Creamy Garlic Mushroom Burger is a complete meal in burger form.  This Roast Chicken Sandwich is so delicious – but make sure you have napkins on hand!!Roast Chicken on Homemade brioche with creamy garlic mushroom sauce, crispy bacon and spinach. The best sandwich. Ever.

Let me just sit back and look at this photo again.  I want to re-live this roast chicken sandwich. Oh it was so good!

Slices of roast chicken piled on a homemade brioche roll with fried mushrooms, creamy-cheesy garlic mushroom sauce, crispy bacon and leaves of baby spinach.

I may have also made this one step naughtier, by lightly toasting the inside of the brioche, and then finishing it off in the pan with the leftover bacon fat.

Sometimes you’ve just got to finish off your toast in bacon fat.

I’m reasonably sure that the happy endorphins released when you bite into bacon-fat-toast cancel out the cholesterol.  Don’t they?

My theory falls within the same gastronomic phenomenon area as the one that says ‘having an extra shot of espresso in your latte raises your metabolism enough to cancel out the calories in the milk’ and ‘you can eat a whole box of chocolates in bed, for breakfast, on your birthday – and you won’t feel sick and fat when you finally get up’.

Oh, did I tell you it’s my birthday today and I’m typing this in bed alongside my box of chocolates…

Yes, I’m 36 today.  I glumly mentioned to Chris that I’m now closer to 40 than 30, and he helpfully pointed out that I’ve been closer to 40 since the day after my 35th birthday.  Whilst I love him dearly, I do so want to punch him sometimes.

He quickly made up for it by TOTALLY SPOILING ME today.  Amongst my pile of presents was a new bike!!
Now that Lewis – my youngest – is riding well on his two-wheeler, it was time for me to get riding again (I haven’t owned a bike for about 5 years) – so I can’t wait to go out for some family bike rides.

Chris also bought me a beautiful set of Damascus steel chef’s knives!!
I spotted them on a knife skills course I went on last month, and have been pining for them since, but they were just too expensive.
So now I have 5 ridiculously sharp knives for every cutting job in the kitchen (and the A&E department on standby).

Ok, I need to stop talking before I actually do mindlessly eat this whole box of chocolates.

Check out the recipe for these brioche buns first:

These buns are light, not overly sweet, and the perfect vessel for a homemade juicy burger

and then the rest of the recipe for these roast chicken sandwiches is below:

Roast Chicken on Homemade brioche with creamy garlic mushroom sauce, crispy bacon and spinach. The best sandwich. Ever.


The Roast Chicken & Creamy Garlic Mushroom Burger Recipe:

5 from 3 votes

Roast Chicken & Creamy Garlic Mushroom Burger

This Roast Chicken & Creamy Garlic Mushroom Burger has Roast Chicken on Homemade brioche with creamy garlic mushroom sauce, crispy bacon and spinach. The best sandwich. Ever.
Prep Time: 15 minutes
Cook Time: 20 minutes
Total Time: 35 minutes
Servings: 4 burgers
Course: Dinner
Cuisine: American, British


  • 4 brioche burger rolls if you want to make them yourself, the recipe is here
  • 2 tbsp olive oil
  • 8 medium mushrooms chestnut or mini portabella are good, sliced
  • good pinch of salt and pepper
  • 6 rashers of streaky bacon smoked or unsmoked - depending on your preference, cut in half widthways
  • 2 cloves garlic peeled and minced
  • 6 tbsp double/full fat cream
  • 100 g (1 cup) strong cheddar cheese grated
  • 1 large handful of baby spinach leaves (about 25g)
  • 2 large roasted chicken breasts well seasoned, sliced (skin left on) - I like to roast a whole chicken and use the breasts for this, and then the rest of the meat for soup like this
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  • Place two frying pans on a medium-to-high heat. Place 1.5tbsp oil in one, and 1/2 a tsp oil in the other. Once the oil is hot, place the sliced mushrooms, salt and pepper in the pan with more oil in, and the streaky bacon in the pan with less oil in. Cook both the mushrooms and the bacon until dark and a little crispy.
    2 tbsp olive oil, 8 medium mushrooms, good pinch of salt and pepper, 6 rashers of streaky bacon
  • Place the bacon and half of the mushrooms on a warm plate.
  • Cut your brioche rolls in half and lightly toast the insides under the grill. When toasted, place the rolls cut-side-down in the bacon pan, and allow the rolls to cook a little more in the leftover bacon fat. Take out once the rolls are darker brown and the fat has been absorbed. Place the rolls on plates.
    4 brioche burger rolls
  • Add the garlic to the remaining mushrooms and cook on a low heat for a minute, then add in the cream and cheese and bring it to a gentle bubble. Let it bubble lightly whilst you start putting the burgers together.
    2 cloves garlic, 6 tbsp double/full fat cream, 100 g (1 cup) strong cheddar cheese
  • Divide the spinach between the 4 burger rolls, then top with the fried mushrooms and sliced chicken. Spoon the cheesy mushroom sauce over the chicken and then top with the crispy bacon. Place the top of the burger roll on top and serve.
    1 large handful of baby spinach leaves, 2 large roasted chicken breasts


Nutritional Information is per serving.


Calories: 594kcal | Carbohydrates: 18g | Protein: 35g | Fat: 42g | Saturated Fat: 19g | Cholesterol: 192mg | Sodium: 570mg | Potassium: 584mg | Vitamin A: 925IU | Vitamin C: 2.6mg | Calcium: 222mg | Iron: 1.2mg

Nutrition information is automatically calculated, so should only be used as an approximation.

Some of the links in this post may be affiliate links – which means if you buy the product I get a small commission (at no extra cost to you). If you do buy, then thank you! That’s what helps us to keep Kitchen Sanctuary running. The nutritional information provided is approximate and can vary depending on several factors. For more information please see our Terms & Conditions.

Welcome to Kitchen Sanctuary

Hi, I'm Nicky and I love to cook! I want to share with you my favourite, delicious family friendly recipes. I want to inspire you to create fantastic food for your family every day.

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  1. Meg says:

    5 stars
    This is amazing! I used thinly sliced chicken breast and cooked in the oven sprinkled with smoked paprika. 👌

  2. Meg says:

    5 stars

  3. Tom says:

    5 stars
    Love this unusual burger. Next time I make this I am going to make my own brioche buns too.

  4. karyld2016 says:

    Oh my gosh, WOW. This sandwich looks so divine! I could probably eat both of these in one sitting, and not even feel guilty 🙂