Combine buckwheat flour, baking powder and brown sugar in a large bowl.
Add milk and oil and mix with a whisk to get a smooth batter, then divide it into 8 mini cake molds.
Add a teaspoon of orange jam on top of each cake, bake in a preheated oven at 360°F for 18 to 20 minutes; when the loaves are done a toothpick inserted in their center has to come out dry.
Remove the mini orange loaf cakes from the oven and let them cool down on a rack, then serve.
Note
Another way to add the jam to your loaf cakes is by piping it in their centre before baking, using a pastry bag. This will give your loaves a more uniform, clean look.The mini orange loaf cakes keep well in an airtight container at room temperature up to 5 days. You can also freeze them to have your small supply of healthy sweetness when needed!