In a bowl, combine the yeast, honey and water. Let set for 10 minutes.
In the stand mixer, cream together the sugar and butter. Mix in the eggs, vanilla and yeast/water mixture. Gradually mix in the flour and salt, turning up the speed, as needed. I start with the paddle attachment, then switch to the hook attachment when dough gets thick. You may have to stop and scrape the sides down with a spatula from time to time.
The dough should pull away from the sides of the stand mixer when ready. This may take 15-20 minutes. Don't mix at high speed. Resist mixing in more flour. But know, the more flour you mix in, the more dense the bread will be. After 20 minutes, gently pull the dough with your fingers. If it stretches without tearing right away, it's ready. Add some oil to the palms of your hands and transfer the dough to a flat work surface and shape into a large ball.
Transfer the dough to a lightly greased bowl. Cover and let rise for 1 to 1 1/2 hour. It must rise in a warm place. I heat my oven to 200 degrees and keep the covered bowl near the warmth of the oven.
While the dough proofs, prepare the topping. Mix the powdered sugar with shortening and vanilla first. Then gradually mix in the flour. If it's too sticky, mix in a little more flour. If it's too dry work in a little more shortening.
Once it proofs, punch down and divide into 12 balls. Place on greased or lined baking sheet. Press down lightly to flatten a little. Cover loosely with a lightweight kitchen towel as your prepare to add your candy topping.
When ready, roll 2 tablespoons of topping into a ball and flatten into a round disc. You can use a tortilla press to do this step. Lightly brush a little softened shortening over tops of dough balls. Place flattened candy topping over conchas and carefully score with a knife, careful not to cut into bread.
Bake in preheated 350 degree oven for 20 minutes, rotating pan halfway through baking time. The bottoms of bread should be golden brown. and lightly golden on top. Let cool completely before storing in an airtight container with a slice of sandwich bread. This will help them stay moist for a couple of days. Best thing to do is to enjoy them while they are fresh.