Baked Onions with Thyme Butter (Keto)

Baked Onions with Thyme Butter Keto

“This is a delicious and interesting side dish using baked onions drizzled with a flavoured herb butter. The onions bake in a tightly-packed foil parcel resulting in a sweet and roasted flavour. And, the thyme butter lifts it to a sensational level!” – Monya




Monya Kilian PalmerFats of Life® is a keto and low carb recipe blog that I love to run as a hobby in my spare time. I am also the author of the best-selling Keto Kitchen Series of cookbooks. This includes my debut best-seller Keto Kitchen (2020). The fun and exciting Lazy Keto Kitchen (2021). And, the clever and inspiring Budget Keto Kitchen (2022). My 4th cookbook, Quick Keto Kitchen (2023) is as fantastic as the first three, and packed with spectacular, easy creations!

The links above will take you to Amazon UK. For USA and other countries, see the global Amazon links here: Keto Kitchen ; Lazy Keto Kitchen ; Budget Keto Kitchen ; Quick Keto Kitchen.


 

The Glow Factor, 2025 by Penelope Corwin is available worldwide. The image above will link to Amazon UK. For USA and all other countries, click here.



More on Baked Onions with Thyme Butter…

While following a keto lifestyle, I think it’s important to explore creative and delicious options that adhere to the diet’s principles. This side dish is a delightful dish that perfectly fits into the keto regime.
 

Baked Onions with Thyme Butter Keto
Baked Onions with Thyme Butter by Monya Kilian Palmer

FOLLOW MONYA:

 
Onions are known for their robust flavour and versatility. Here, I have transformed the simple bulb into a delicious keto-friendly dish.
 
The natural sweetness of baked onions pairs harmoniously with the earthy notes of my thyme and garlic butter. The butter itself imparts richness and depth to the overall taste. Meanwhile, the garlic and thyme add some interest and another flavour dimension. This low-carb, high-fat side dish aligns perfectly with the keto diet, making it an excellent choice.
 
With its simplicity, delightful flavours, and health benefits, it is a perfect addition to any keto recipe collection.
 

It is important to note that to maintain ketosis, it’s essential to track carbohydrate intake and ensure it aligns with your daily macro goals. Consulting with a healthcare professional is advised before making significant dietary changes. Scroll to the bottom to see the full macros and allergens for this Baked Onions with Thyme Butter dish, as well as all the Side dishes on Fats of Life®.
 

Baked Onions with Thyme Butter Keto
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Baked Onions with Thyme Butter

A delicious and interesting side dish using baked onions and flavoured butter... The onions bake down to a sweet, roasted flavour and the thyme butter lifts it to a sensational level!
Course Side Dish
Cuisine General
Prep Time 10 minutes
Cook Time 45 minutes
Total Time 55 minutes
Servings 4 as a side dish

Per serving

Calories: 154kcal | Carbohydrates: 5.9g | Protein: 0.9g | Fat: 14g

Ingredients

For the thyme butter

  • 50 g unsalted butter, softened (room temperature)
  • 2 tsp fresh thyme, picked leaves
  • 1 clove garlic, peeled and crushed
  • sea salt flakes

For the onions

  • 2 large onions, peeled and halved
  • 4 tsp olive oil
  • fresh thyme, picked leaves (optional garnish)

Instructions

  • Preheat the oven to 180°C (fan oven). This is 200°C for conventional ovens (or 400°F / gas mark 6).
  • Start with the butter. Pick the leaves off several thyme sprigs until you yield at least two teaspoons full. This can be easily done by simply running your fingers gently down the stalk in the opposite direction of the leaves' growth.
  • Add the leaves to the softened butter (which is simply butter left at room temperature for several hours). Use a garlic press to crush the garlic cloves into the bowl. (NOTE: I used a garlic press here to ensure I only yielded the lovely inner garlic flesh. Discard the bits left in the press between crushing each clove.)
  • Season the butter with salt and combine well before tipping out onto a sheet of cling film. Roll the butter in the cling film to form an even-sized 'mini log'. You will be slicing them into 4 thick discs later, so estimate here). Twist the ends and place in the fridge to set firm for at least 40 minutes while you preheat the oven to 180°C (fan oven). This is 200°C for conventional ovens (or 400°F / gas mark 6).
  • For the onions, place the peeled and halved onions into 4 individual squares of strong aluminium foil. Drizzle a teaspoon olive oil into each halved onion and ensure they are well coated. Season with salt and wrap tightly so you are left with 4 little foil parcels.
  • Place onto a baking tray and bake in the oven for 45 minutes.
  • Just before the onion's time is up, remove the little log of butter from the fridge, unwrap the cling film and slice into 4 even-sized thick discs.
  • Carefully unwrap the onions and discard the foil. Place the butter pieces onto the flat side of the hot onions (to melt) and scatter over any additional fresh thyme.

My name is Monya Kilian Palmer. If you loved this recipe, please follow and tag me @mkilianpalmer on Instagram so we can all see your lovely creations!
* * *
The links above will take you to Amazon UK. For USA and other countries, see the global Amazon links here: Keto Kitchen ; Lazy Keto Kitchen ; Budget Keto Kitchen ; Quick Keto Kitchen.

Baked Onions with Thyme Butter (Keto)
Nutritional Information per serving
Calories                        154Kcal / 644kJ
Fat                                14g
Carbohydrates              5.9g
Protein                          0.9g

Allergens
Milk




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Disclaimer: The nutritional analysis, macro and allergen breakdown of the recipes on this site have been manually and carefully calculated using the cloud-based software NUTRITICS®. NUTRITICS® is fully approved by the relevant Trading Standards organizations and is EU and FDA-compliant. The macro calculations are provided as a courtesy to you based on the author's weighing of ingredients when creating the dishes. If Erythritol (a sugar polyol) has been used in any of the recipes, it has already been manually excluded from the final carbohydrate count. The author is a chef - not a medical professional - and this website has been designed to provide you with recipe ideas to suit the low carb lifestyle you have discussed with your GP.



1 Comment

4 from 3 votes (3 ratings without comment)

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