I dont know how adding baking powder wouldn't make it puff up. but im not to sure about that yet. But pretty much you could use with the pricking or the weighted meathod. Weighted works better but is more time consumeing for large batches (especially minis) but i suggest removing the weights half way through to prevent the edges from over cooking. As for pricked... it works ok but then you get some holes, and for a liquidy baked custard like quiche, i like the weighted method. Also make sure you use a mealy pie dough as opposed to a flakey to reduce saturating the crust.
Chocolate kisses
Coffee Kitten