If you are a Nutella fan than these cupcakes are definitely worth the effort. Make sure that Nutella jar is at room temperature.
Mix oil and Nutella so that it becomes silky smooth and easy to pour into the batter. Beat eggs with a fork and add in castor sugar and beat a few minutes more. You can use a hand whisk for this. Sift in the dry ingredients. Now add in all the wet ingredients to the dry ingredients. Use a rubber spatula here. Then pour them in the cupcake tray lined with liners. Fill half of the cupcake liners. Bake at 180 degrees in a preheated oven for 20 minutes or till the skewer comes clean. Let them cool down completely before icing.
For icing you will need :
Whip up the butter till it becomes frothy then add sugar and Nutella and the salt. Whip it for another few minutes till it becomes more smooth.
Use a Wilton 2 D tip for piping. Cut strawberries into thin slices and then add them on the top. Trick is to put the iced cupcakes in the fridge for the buttercream to set.