This is a blast from the past for me. These cookies disappeared at light speed when I was growing up, and my kids make them disappear just as fast. (Add the full grated rind to the mix, and about half of another one for the icing.)
Mix flour, sugar, baking powder, salt & shortening (should resemble pastry mixture).
Add orange rind & mix.
Add beaten egg & enough orange juice to make a soft & sticky biscuit like dough.
Drop from a teaspoon onto nonstick cookie sheet & bake @ 375°F for 10-12 minutes.
Ice while still warm with icing sugar, orange juice & a little orange rind.
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