Melt 100 g salted butter in large pot then add 5 sprigs thyme and 1 brown onion (chopped) - allow to soften for 5 minutes whilst you roughly chop the 1 kg mushrooms
Add mushrooms to the pot with ½ teaspoon salt + ½ teaspoon ground pepper - fry until the mushrooms reduce in size and they turn a golden colour (15 minutes)
Increase the heat to high and fry for a further 5 minutes whilst occasionally stirring (this helps to add a toasty flavour to the soup)
Finely chop 4 cloves garlic and add to the pot - stir and fry for 1 minutes
Then add 1200 ml whole milk and 1 chicken stock pot, increase heat until you get a rolling bubble (but not boiling), then reduce heat to low/medium and simmer for approx 20 minutes
Remove thyme stalks from the soup (we don’t want them blended up) and blend the soup until totally smooth
NOTE: if soup is too thick for you personally, simply add more stock/water to achieve the desired consistency
Serve with optional garnish of chives & truffle oil
Notes
Step-by-Step Photos: My blog post (above) includes helpful step-by-step photos to help guide you through making this recipe and build confidence whilst cooking.I have created this recipe to result in quite a thick soup, as it's easy to 'thin down' with extra water and stock. I wanted to cater to all needs, so this is a good starting point.