In a food processor, combine flour, baking powder and salt.
Add cold butter and pulse until mixture looks like fine crumbles.
While the food processor is running, add milk through the top. Combine only until mixture comes together.
Divide dough into 8 pieces. I like them to be the same so I use a scale - each ball weighs about 1.2-1.3 oz.
Roll out each ball on a lightly floured board until big enough to cover apple.
Sprinkle with 1/4 t. sugar. Sprinkle with cinnamon.
Place on a parchment lined baking sheet (if flash freezing) or in a 9 x 13 pan if baking immediately.
Do this for the remaining apples.
When ready to bake, make the sauce by combining 2/3 c. sugar, 1/2 c. water, 2 t. butter, 1/2 t. cinnamon, 1/8 t. nutmeg in a small saucepan. Heat until mixture comes to a boil.
Pour sauce over apples and bake at 375° for about 35 minutes or until apples are done. If baking frozen apple dumplings, lower heat to 350°, cover with foil and bake 30 minutes, then uncover and bake 30 more minutes until apples are done.