Mix the sugar, cane sugar, flour, baking powder and salt in a large bowl. Mix the milk, eggs, butter and vanilla sugar together well in another bowl. Make a well in the middle of the dry ingredients. Add the milk mixture and stir until everything has combined. Stir in the nuts and chocolate chips. Pour the batter into a greased muffin tin (also grease the edge around the indentations). Bake in a preheated oven at 200 ° C for approx. 15-20 minutes (make a stick test). Take the tin out of the oven and let it cool for five minutes. Remove the muffins from the tin and place on a rack to cool. Serve warm or cold. Makes 12-14 delicious muffins.