In a large bowl, cream butter with the 2 different kinds of sugar and maple syrup with the help of an Electric hand mixer for a few minutes until fluffy, then mix in the eggs, and finally the yogurt.
Sift dry ingredients together (flour, baking powder, salt) then fold into the wet ingredients by hand using a Rubber spatula). Do not use a mixer at this point.
Pipe or spoon the donut batter into the cavities of your donut mold.
Bake for 13-15 min or until a skewer inserted comes out clean. Let the donuts come to room temperature before glazing.
Maple glaze
Gently heat maple syrup with butter over low heat, then mix it with powdered sugar.
You might need slightly more or less wet ingredient (maple syrup) to the powdered sugar depending on the powdered sugar and humidity in your kitchen. If the glaze is too thick, add more maple syrup. If the glaze is too thin, add more powdered sugar.
Hold the donut with your fingers and dip it into the glaze. Move the donut a bit for a few seconds then carefully remove it from the glaze. While still holding the donut with your fingers (facing down), carefully remove any excess glaze from it with the help of your fingers on your other hand. Let the glaze fully set in room temp or in case your kitchen is too warm, place it into the fridge.
Serve the donuts fresh at room temperature. Any leftovers can be stored at room temperature in an air-tight container for 2-3 days.
Notes
INGREDIENT NOTES
All ingredients must be at room temperature to properly emulsify: eggs, butter, yogurt, etc.
TECHNIQUE NOTES
A digital scale is required for a consistent, happy baking experience:)
Do not overwork the cake batter, after the wet ingredients are whipped up, switch to a rubber spatula to incorporate the dry ingredients
If not using a silicone baking mold, make sure to properly grease your tin. Check my article about how to get cake out of the mold and how to properly prepare a non-silicone mold
Always pre-heat your oven and consider using a digital oven thermometer for the best results. Do not over bake the donuts as that would result in a dry texture.
Never glaze warm donuts, make sure they are at room temperature or chilled.
For glazing the donuts neatly, the thickness of the glaze (not too thick, not too thin) is key.