Mix together plain flour, whole wheat flour, and salt. Set aside.

Place yeast, lukewarm water, and 1 teaspoon sugar in a small bowl. Set aside until foamy.

Beat egg, the rest of the sugar, vanilla extract, and orange zest into the yeast mixture.

Add half the flour mixture, stir together with a fork. Add melted coconut oil, keep stirring.

Add the remaining flour mixture, stir dough until it starts to come together. Flour a work surface and knead until dough is smooth, soft, about 8-10 minutes (add more flour if necessary). Place in a lightly oiled bowl; cover with plastic wrap. Set in a warm place to rise until doubled, about 1 1/2 hours.

Roll dough(no need to flour work surface) to 1/4 inch/1/2 cm thickness. Using a 2 inch/5 cm round cutter, cut 33 rounds. Cover with plastic wrap; let rise 25 minutes.

Preheat oven to 400°F/200°C. Brush doughnuts with oil, bake for 8-10 min or until golden brown. When taking the doughnuts out of the oven immediately brush with another coat of oil.

Fill doughnuts with jelly, and sprinkle with confectioners sugar before serving.