a phrase

hallo,

I found this phrase in the article of a interior design magagine.

" Your home is is what you make of it. Make the interior warm and inviting with well done-up and aesthetically furnished rooms. So much so that you feel it's nice to get home and put your feet up"

Could any one explain the phrase "so much so that" ?

Is it 'so much so + that' or 'so much + so that'?

Thanks in advance

It's equivalent to the shorter (better, in my opinion) "so much that." The 'much' refers back to an earlier descriptive word; it avoids repetition of descriptive words sort of like a pronoun avoids repeating nouns in exactly the same way.

In your example, it means "Make the interior warm and inviting. So warm and inviting that you feel it's nice to get home."

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I think you can legitimately look at the word grouping as either "so much so + that" OR "so much + so that". In either case, the middle 'so' is optional.

So much so that... = so much it is the way we just described it that...