Okashi na Tensei: Saikyou Pâtissier Isekai Kourin

Pastry Mille Morteln, age 9, is both his father's heir and the reincarnation of an unfulfilled pastry chef. While he dreams of a land filled with sweet treats, there's a lot to be done first! From learning how to fight, to controlling his new magical talents and doing his best to defend his village from bandits, and yet all he really wants to do is bake the perfect apple pie... Pastry Mille Morteln has his work cut out for him in Sweet Reincarnation.

(Source: J-Novel Club)