A douhgnut/ donut can be any shape and can be made any way you want. Here I made some really good apple donuts. Take a look at how I mage them. It only took about 10 minutes.
1 1/2 cup flour
1 cup sugar
1 tsp baking powder
1 cup water
1 apple shredded (with skin)
Mix all the ingredients together until smooth. Shred your apple on a regular shredder and add it into your mixture. Then in a very small pot fill it almost half way with regular oil (Not olive oil). Turn the stove on to medium heat and Preheat the oil for about 5 minutes before you start cooking your banana balls. (You want the oil to be hot).
Once hot take your mixture into regular tablespoon fills and drop them into the oil. Do about 5 balls at a time. When they are light broom and fluffy on one side turn it over to get brown on the other side this should take 1 - 2 minutes.
Once cooked remove it from the oil and put them onto a paper towel to remove the excess oil.
There you go. I brushed it with some powdered sugar and made a fresh whipped cream to go along with it
From my kitchen to yours