In a medium-sized bowl or bowl of the food processor* whisk together flour, sugar, salt and baking powder, add the egg, egg yolk and butter, combine until the dough is almost combined. If making by hand then use a fork to combine.
Remove from the bowl/food processor place on lightly floured flat surface and knead to form a smooth compact dough (it should not be sticky). Wrap the dough in plastic and chill for 30 minutes in the fridge.
Remove from fridge and taking 1/4 of the dough at a time roll into a very thin rectangle or square, cut into approximately 2-3 inch sizes and fry in a pot of hot vegetable oil (approximately 2-3 inches (5-8 cm) of oil, temperature must reach 340-350F (170-175C) and try to stay at this temperature or they could burn). Fry until golden turning the frappe over while frying. Remove to drain and cool on a plate lined with paper towels. Sprinkle with powdered sugar or drizzle with melted chocolate. Enjoy!
*You could probably use a standing mixer with the flat beater attached.
Notes
If you prefer yours baked then place the strips on a parchment paper lined cookie sheet and bake in a 350F (180C) pre-heated oven for about 8-10 minutes. Let cool then dust with powdered sugar.
How to store the Frappe
If you fry them then they really should be eaten the day they are made, although baked or fried can be stored in a paper bag for 2-3 days.Calorie count is before deep fried.