how about a good plain yogurt, avoid no fat, or very low.
greek is nice, avoid extra flavourings/honey.
Lidl some in large pots with a handle, and they sell a lot.
i would caution against brushing one's teeth after eating sweet things, or acidic, that can cause erosion.
best to finish meal with something else, eg cheese as alkaline, or nuts plain, and or rinse with water or alcohol-free mouthwash.
do not brush immediately after eating, better to do so before, to make the teeth smooth, so less food particles adhere to the surface.
if you brush immediately afterwards it will be like scrubbing the front step, acid from the food combines with pressure from the brush, wears away the surface.