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1
Start with the crust.
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2
Crumble the cookies into the workbowl of a food processor and process to crumbs.
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3
This will give you about 2 cups.
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4
Put them in a bowl and mix in the melted butter.
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5
Press the crumbs evenly over the bottom and up the sides of a 9-inch pie pan.
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6
Chill.
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7
Get busy making the filling.
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8
Sift the sugar, cornstarch, flour, salt, and cinnamon together into a bowl and set aside.
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9
Combine the chocolate chips and milk in a saucepan and set it over medium heat, stirring constantly.
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10
As soon as the chips are melted, pull the pan off the heat and pour half of the chocolate mixture into the dry ingredients.
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11
Mix well.
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12
Whisk the yolks and vanilla together in a bowl and pour into the remaining chocolate in the saucepan.
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13
Stir it around and then add the chocolate and dry ingredient mixture.
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14
Set the saucepan back over medium heat and whisk like crazy.
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15
Once the mixture starts to thicken, keep whisking and cooking for 2 minutes.
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16
Pour the chocolate filling into a bowl to cool for 10 minutes; then dump it into the pie shell and level the top.
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17
Chill for several hours in the fridge.
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18
Cut into wedges and serve slathered with whipped cream.
