Amai Okashi no Nochi wa Amai Dekiai wo: Konyaku Haki Sareta Reijou wa Henkyou Haku Shisoku ni Dekiai Sareru

Richelle is your average lady of nobility: charming and madly in love with her busy fiancé. However, on her way to the palace to give him some treats she baked to help him get through the day she spots him kissing another lady that he was initially working with! After being ridiculed for making baked goods, the engagement was called off. However, a handsome margrave named Lucien comes across her snacks, and after tasting them cannot help but express how refreshing they were. Now begins a fresh romance between the charmed margrave, and totally unaware sweets connoisseur! (Source: MangaPlaza, edited)