Mix flour, cocoa, sugar, baking powder and salt, add the egg, yolk and butter, mix with a fork or pulse to combine. When all combined, knead the dough and refrigerate.
Place the dough in the pie plate, trim the dough of any extra dough then prick the dough all over. Chill for 30 minutes before baking.
Pour the peanut butter filling mixture and sprinkle with cholate chips. Refrigerate for at least 4 hours or over night. Enjoy!