Cream together butter and sugar.
Add Fage Greek yogurt and egg.
Add in baking powder, baking soda and flour.
Roll your dough into 4 balls and chill 1-2 hours.
Preheat oven to 375 degrees.
Flatten each ball with hands until you make a circle about 1/4" thick.
Spread with marmalade, then sprinkle with walnuts and cinnamon.
Roll jelly roll style and place seam down and greased cookie sheet.
Repeat with other balls.
Bake for 30 minutes or until brown.
Cool mandel bread slightly and slice 1/2 inch think pieces.
Continue to bake at 375 on each side until crispy.
Melt chocolate in double boiler or microwave. Add in orange zest.
Dip ends of mandel bread into chocolate. Let dry on parchment paper.