Pre-heat oven to 350F and spray a donut pan with cooking spray.

In a small bowl, melt butter.

In a medium bowl, whisk together flour, baking soda & salt, set aside.

In a large bowl whisk egg until lightly beaten. Then add melted butter and vanilla, whisking until combined.

Add both sugars and whisk for 1-2 minutes.

Add milk & yoghurt to the wet mix and whisk until combined.

Add your dry ingredients and mix until just combined.

Add your donut mix to a piping bag (or ziplock bag) and fill your donut pan.

Bake in the oven for 13-15 minutes, or until edges are lightly golden. Let them cool completely.

In a medium sized bowl, sift your icing sugar & cocoa powder.

Add the milk & stir until it is combined.

Once the donuts are cool, dip them into the bowl & place on a cooling rack sitting over a baking pan (to catch the drips).

After 5 minutes, dip the glazed donuts into chocolate sprinkles.

Wait 10-15 minutes for the glaze to harden, then enjoy!