Preparation Position rack in center of oven; preheat to 350°F. Butter and flour large baking sheet. Whisk first 3 ingredients in medium bowl. Beat butter, sugar, orange peel, and orange extract in large bowl until fluffy. Beat in yolk, then cream. Add flour mixture; beat until dough comes together in moist clumps. Stir in chocolate chips. Drop dough by generous tablespoonfuls onto baking sheet, spacing 3/4 inch apart. Using moistened fingertips, flatten each to 1/2-inch-thick round. Bake cookies until golden, about 18 minutes. Transfer to rack; cool. (Can be made 3 days ahead. Store airtight at room temperature.)
Preparation Position rack in center of oven; preheat to 350°F. Butter and flour large baking sheet. Whisk first 3 ingredients in medium bowl. Beat butter, sugar, orange peel, and orange extract in large bowl until fluffy. Beat in yolk, then cream. Add flour mixture; beat until dough comes together in moist clumps. Stir in chocolate chips. Drop dough by generous tablespoonfuls onto baking sheet, spacing 3/4 inch apart. Using moistened fingertips, flatten each to 1/2-inch-thick round. Bake cookies until golden, about 18 minutes. Transfer to rack; cool. (Can be made 3 days ahead. Store airtight at room temperature.)