In a bowl, beat the eggs with the sugar and oil until light and frothy.

Add the milk and cream, vanilla, flour with the baking powder, ground oats and a pinch of salt and continue beating with an electric whisk for 2 more minutes. Then, add the melted butter and mix again.

Fill the cups of the mold and add the blackberries and oat flakes. Bake in the oven, preheated to 180 °C, for 20-25 minutes until the muffins have risen and are firm to the touch. Remove from the oven and allow to cool. *For best results, grease or flour the pan at the beginning of the preparation.