I've rated this recipe before and I've made these crab puffs several times. After reading another review for these puffs, I have to second that my pastries were usually too brown and many times I found myself cutting the bottoms off. 20 minutes is perfect- remember they have to bake a second time when stuffed with the crab mixture.
I've also substituted the salt with garlic salt instead, increased the horseradish to 1 tsp, and substituted the 2 TBSP of onion for minced green onion. It was just the "punch" that this recipe needed not to mention a little color. These really are wonderful and when I have parties, they are the first appetizer to go. They really are quite impressive and nobody will believe that you made them yourself!