Loste Café is a Danish bakery opened by Stefano Ferraro and Lorenzo Cioli, two Italians who met at the star restaurant Noma, in Copenhagen. It's a simple (but with a good taste!) coffee shop, with amazing cinnamon rolls - Lorenzo is the former head of pastry in Noma - and a good option for a healthy quick lunch.
Flowers lovers! Orto Botanico di Brera is an hidden treasure right in the center of Brera and near by Pinacoteca.
The garden is a university and museum, there they organize events and activities for the public and schools. It has an amazing collection of flowers and medicinal plants, plus little corners where you can stop by and enjoy the silence for a bit.
I consider e/c natural wine shop a hidden treasure in Milan. Inside a building with an "Emergency" (that is actually an ONG) plaque outside, the first thing one might think is that is a hospital. Once passing the wall, there's a cute internal square, with Basilica di Sant'Eustorgio view. You can sit both inside or outside, which a strongly recommend for spring and summer days. A nice place for just passing by to grab a bottle of wine and drink it at home, having a glass of wine (they have many options) or enjoying a relaxed evening.
Founded in 2011, Paladini 8 is a space of 500 mq which includes a backyard, a bar/bistrot, a vinyl and book shop, an exhibition room, a coworking space and a bunch of private offices with professionals in the creative field. Concerts, exhibitions and events are organised every night.
This place represents an active and important landmark in the new cultural and artistic scene of Milan.