Use nonstick miniature muffin tins 2 inches or 5 centimeters in diameter
Weigh butter and sugar into TM bowl; cream to combine well for 1 minute at speed 3.5
Add vanilla extract; combine for 5 seconds at speed 3
Weigh in dry ingredients; stir to combine for 30 seconds from speed 2 to 5 until dough begins to clump
Remove from TM bowl; form into a ball
Cover and refrigerate 30-60 minutes; form into small balls (15 grams each)
Using fingertips, press dough onto bottom and up sides of each individual miniature muffin tin mold ensuring even sides and bottom; dock each with tines of fork to prevent puffing when baking
Place filled unbaked shells into freezer for about 15 minutes or refrigerator for 30 minutes to prevent puffing while baking; pre-heat oven to 325F ensuring rack is in centre of oven while cooling shells
Bake 16-18 minutes or until edges a light golden brown; check halfway through and lightly prick bottom of each shell, again, if necessary
Set on rack still inside nonstick miniature muffin pan to cool completely: important to prevent breakage as shells are very fragile until completely cool
Place flat surface (pan) over shells; carefully invert entire pan onto flat surface, gently knocking on bottom and lift to reveal shells
Shells store very well in tightly sealed labeled and dated container in freezer for 3 to 6 months