Here is the full list of all 12 Idle Baker Boss achievements.
Bake 500 Choc. Chip Cookies
Collect 10k Coins
Sell your store first store
Make 10k Exquisite Goods
Consume 1k Full Coffees
Gain 1k gems through displays sold
Maximize profits from selling your store 3 times
Franchise your first store
Buy your first piece of land
Claim Gifts from completing 10 Challenges
Purchase 10 properties
Purchase 50 HQ Upgrade XP