Generally the concept of “shelo le’vayish” is said when one is “ein lo”, we don’t want to shame someone who doesn’t have this. Since here we have both we wouldn’t say that. However putting both applesaucea nd sour cream on a donut might make you be oiver “ve’nishmartem es nafshoseichem” since the caloric value would be astronomical. This would be especially true for bakery donuts which start off with 3000 calories anyway.
You don’t have to wash even though the donut batter has somewhat of a “losh” concept but since its much softer than “issah” dough, there is no motzi but rather a mezonos like any other batter cake. However the bakery type which has a firmer dough and is baked might be an issue if you eat 3 or 4 ( boy are you ever a glutton ). At any rate the brocho would be mezonos, but you would have to bentch. However, since often donuts, especially the smaller jelly donuts, are clearly eaten as a snack, even eating a large amount of the smaller jelly donuts ( my record is 10, ok so I’m a glutton ), would still not put you into the category of washing and bentching. Le’maase, most people do eat the donuts as a snack. And if you’ve eaten them as part of breakfast, you may have washed anyway.
Sacrilege, you seem to be bound by your name as I’ve seen that you are clearly oiver many very important minhagim of klal yisroel. Such as in this case not eating donuts, you’ve indicated you don’t eat chulent. I have a sneaky feeling that you’ve never eaten matzo with chicken schmaltz and gribines on Pesach (the idea horrifies me). I suggest you re-examine your teshuva of Rosh Hashono and Yom Kippur.