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Preheat oven to 375 degrees F.
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Line the outside of a 9" springform pan with aluminum foil.
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To Make Crust: In a medium bowl, combine graham cracker crumbs, peanuts, and cinnamon.
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Stir in butter.
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Press the mixture onto the bottom and sides of an ungreased 8 or 9" springform pan, and set aside.
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To Make Filling: In a large mixing bowl, beat cream cheese, peanut butter, sugar, flour, and vanilla with an electric mixer until smooth.
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Add eggs and egg yolk all at once, beating on low speed until combined.
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Stir in half-and-half and chocolate chips.
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Pour batter into the springform pan.
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Place the pan in a large baking pan, pour boiling water into the baking pan until it comes 1/2 way up the sides of the spring form pan.
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Bake in the preheated oven for 40-50 minutes.
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Let cake cool completely, and keep in refrigerator for at least 4 hours before serving.