Mix dry ingredients; flour, sugar, baking powder, cinnamon, walnuts, chocolate chips
Cut in butter (put it in in small pieces) and mix till dry mixture gets slightly clumpy
Combine yogurt, milk, and egg yolk with blender
Stir into dry mixture with a fork till mixture is moist.
Flour a cutting board and kneed dough into ball
Place in greased pie tin or on greased cookie sheet (flatten the ball into a 3/4 inch patty)
Sprinkle top with sugar
Bake at 425 for 20-25 mins. Remove from oven and let cool.
Enjoy with a glass of milk :-)