In each round, she sipped on coffee and made her guess. From a “poorly made” Folgers coffee from a drip machine to a mug of Cafe Bustelo made in a Keurig, Vergara nailed all five tests.

Coffee prices have already been going up for a few years. This past summer, brands like Folgers and Maxwell House raised their prices to pass on previous commodity increases to customers.

Extreme temperatures and severe droughts are ravaging Brazil, the world’s largest coffee producer, and taking a heavy toll on ...