PREHEAT oven to 375º F. Combine cocoa and vegetable oil in small bowl until blended.
COMBINE flour, baking soda, cinnamon, and salt in small bowl. Beat butter, 1 cup sugar and egg in large mixer bowl until creamy. Add corn syrup and cocoa mixture; beat well. Gradually beat in flour mixture. Shape dough into 1-inch balls. Roll balls in remaining 3 tablespoons sugar to coat. Place 3 inches apart on ungreased baking sheets.
BAKE for 9 to 11 minutes or until sides are set and centers are still slightly soft. Cool on baking sheets for 2 minutes; remove to wire racks to cool completely. Store in airtight container