Filling:
Cream butter, brown sugar and cinnamon together. Set
aside.
Biscuit:
Combine flour, sugar, baking powder and salt in food
processor bowl. Cut in butter until crumbly. (Or prepare
by hand with a pastry blender.)
Whisk
egg and milk together. Add all at once to the dry ingredients
and whirl briefly to combine.
Turn
dough out onto a floured surface and roll or pat into
a 9 or 10 inch square. Spread filling over, and roll
up like a jelly roll. Cut into 12 slices.
Arrange
rolls in a greased 9 inch square baking pan. Bake at
400 degrees F. for 20 to 25 minutes. Remove from pan.
Icing:
Combine icing sugar with enough milk or cream to make
a thin glaze. Drizzle over the rolls.