Sift first 5 ingredients in a large bowl. Using a mixer, beat the butter and sugar, then one by one, add eggs. Add pumpkin and vanilla. Add the mixture of dry ingredients, adding a little of it, then some milk and so on until run out as the last finish with the dry mixture. Add chocolate chips and confusion well. Greased round cake or 6 small muffin. Pour the mixture in the form. Bake for about 55-60 (30-35 for muffins) minutes in preheated oven or until 175S through the center toothpick comes out clean. After removing from the oven leave the cake in the form a further 15 minutes, then turn on a wire rack and allow it to complete cooling. For more chocolate flavor can melt 50 g of chocolate with 2 tsp sunflower oil and pour the cake.