You are all wrong about the handwriting, it's my grandmother's.
When my mum was a little girl, so 1950s, they would go on holiday for a week at a 'guesthouse', my grandmother would plan a week of meals and then buy the food for the landlady to cook.
I'm not sure if that was to do with rationing.
My mum had the BeRo cook book.
Both my grandmothers baked, maybe not every day but cakes and pies were all home made. And my mother's mother was widowed, but because she was under 40 she didn't get a full widow's pension so had to work. Probably not as complicated as running a business.
She would occasionally make us bread with cheese and onion baked into it, delicious still warm with lots of butter.
My father's mother would make 'spice cake' which was basically a fruit cake, there was always some in the pantry and if you were offered a cup of tea you got a slice of the cake with a slice of cheese.