Preheat the oven to 180C (350°F).
Whisk the eggs in a small bowl or, for a vegan version, mix the flax eggs and set aside.
Mix the plant-based milk and apple cider vinegar, then set aside.
In a large mixing bowl, combine the flour, sugar, baking powder and salt.
Add the milk mixture, flax eggs, orange zest & juice and the oil and mix gently with a large wooden spoon. Add more plant-based milk, if the batter is too thick. Don’t overmix!
Gently fold in the marmalade and chopped chestnuts.
Spoon the batter into silicon mini bundt cake moulds.
Bake for 20 – 25 mins until an inserted toothpick comes out clean.
Let them cool for 5 minutes in the tin, then turn them out onto a wire rack. Let them cool completely.
Meanwhile, heat the glaze in a small pan, let it cool. then then brush the cakes with it.