also: あんドーナッツ
noun
doughnut filled with red bean paste
A Japanese-style doughnut with anko (sweet red bean paste) filling. Common in bakeries and convenience stores.
あのパン屋のあんドーナツは、あんこがたっぷり入っていて美味しい。
The an-doughnuts from that bakery are delicious, with plenty of red bean paste inside.
コンビニでおやつにあんドーナツを買った。
I bought an an-doughnut as a snack at the convenience store.