Heat milk to luke warm, sprinkle with sugar and yeast, let bloom for 5 mins
Meanwhile, mix flax meal with water, let stand until thickened
Mix dry ingredients in a bowl, make a well in center
Pour in flax and milk, mix with wooden spoon
Knead in margarine until combined, then knead in oil flavoring
Divide dough into 2 portions, knead in cocoa powder to one, red food coloring to the other. To the red one, drop more oil flavoring.
Wrap dough with cling wrap, chill for 30 minutes
Take out dough and roll each
Using heart shaped cookie cutter, cut hearts on red dough
Cut strips chocolate dough
Stack 3 hearts together, then wrap the outside with chocolate dough
Trim excess dough and place hearts on tray
Freeze hearts for 30-45 minutes
Preheat oven to 400 F
Take out hearts and slice into cookies, bake for 12 minutes
Let cookies stand on pans for at least 10 mins before moving to cooling rack