In a large mixing bowl, cream together butter and sugars until smooth (I do this by hand, with a wooden spoon).
Stir in vanilla and then blend in egg.
Add the flour, cornstarch, baking soda and salt (I sift these four ingredients through a sieve first) and combine; stir in chocolate chunks and stir to incorporate chunks throughout the dough.
Chill dough in fridge for one hour, two if you can spare the time.
Preheat oven to 350°F; line your cookie sheets with parchment paper.
Drop dough by tablespoons onto cookie sheets and bake in preheated oven for about 8-10 minutes, or until cookies are golden brown around the edges.
Remove cookies to wire racks and let cool.

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Nutrition Facts

Per Serving Per 100 g

Amount Per 1 Serving
Calories	488.72 Kcal (2046 kJ)
Calories from fat	196.75 Kcal
		% Daily Value*
Total Fat	21.86g	34%
Cholesterol	73.82mg	25%
Sodium	341.62mg	14%
Potassium	83.87mg	2%
Total Carbs	71.04g	24%
Sugars	42.87g	171%
Dietary Fiber	1.51g	6%
Protein	5g	10%
Vitamin A	0.2mg	7%
Iron	1mg	6%
Calcium	55.5mg	6%

Amount Per 100 g
Calories	403.13 Kcal (1688 kJ)
Calories from fat	162.29 Kcal
		% Daily Value*
Total Fat	18.03g	34%
Cholesterol	60.9mg	25%
Sodium	281.79mg	14%
Potassium	69.18mg	2%
Total Carbs	58.6g	24%
Sugars	35.37g	171%
Dietary Fiber	1.25g	6%
Protein	4.13g	10%
Vitamin A	0.2mg	7%
Iron	0.8mg	6%
Calcium	45.8mg	6%

* Percent Daily Values are based on a 2000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
Find out how many calories should you eat.

Tastes

salty
savory
bitter
sweet

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