Simplify the following text for a Grade 10 native English-speaking person.
Original: One of the most popular early cookies , which traveled especially well and became known on every continent by similar names , was the jumble , a relatively hard cookie made largely from nuts , sweetener , and water .
Simplified: One of the most popular early cookies , which traveled very well and became known on every continent , was the jumble , a hard cookie made mostly from nuts , sweetener , and water .