Step 1
Preheat oven to 350°F (180°C).
Step 2
In a bowl, whisk together flour, baking powder, baking soda, salt and nutmeg; set aside.
Step 3
In a large bowl, whisk together kefir, eggs, butter and vanilla. Add sugar and whisk until combined. Add flour mixture and stir until batter is smooth and no flour remains.
Step 4
Spoon batter into buttered donut pans and bake for about 10 minutes or until tester inserted in centre comes out clean. Let cool completely.
Step 5
Glaze: In a bowl, sift icing sugar into a bowl and whisk in charcoal. Whisk in kefir until smooth and runny.
Step 6
Dip each donut into glaze and place on cooling rack set over a baking sheet. Repeat with remaining donuts.
Step 7
Sprinkle each donut with edible glitter and swirl; let stand 2 hours to set or enjoy right away!
Tip: To easily fill the donut pans, scrape batter into a resealable bag and cut 1 corner. Squeeze into each donut space equally.