Prepare the mini muffin cups, mini bundt pan cups or mini doughnut pan with non stick cooking spray.
Place all the ingredients for the doughnut batter into a large bowl and mix to combine. The batter will be wet like a cake batter.
Spoon the batter into a gallon sized zip-top bag. I do this by holding one bottom corner of the bag in my hand like a cone and then folding the rest of the bag over the op of my hand to form a large opening. This keeps the batter into one end of the bag for ease of use.
Cut a small hole across the corner of the bag that you loaded the batter into about 1/2 inch for the bottom corner.
Squeeze the dough into the prepared pans filling no more than 2/3 full.
Bake for 8 to 10 minutes or until a toothpick inserted into the doughnuts comes out clean. Transfer to a wire rack and cool completely before glazing or frosting.
To prepare the glaze, combine the powdered sugar, water and vanilla and whisk until smooth.
Dip one side of the doughnut into the glaze. Place the doughnut, glazed side up, on a wire rack and immediately add sprinkles over the glaze, if desired. Repeat as desired with remaining doughnuts.
These doughnuts are made of a quick and easy cake batter version and would suggest the need for a special "mini doughnut pan" but instead I went in search of something I already owned that would deliver the same end result. I found that I could use my mini bundt pan, a mini muffin pan or even a cake pop pan (think doughnut holes) to achieve the same results without buying yet another specialty pan to add to my growing collection of kitchenware. So if you don't have a mini doughnut pan, I strongly urge you to just improvise.