Sweet Science Filter Blend

Sweet Science

Sweet Science is our brand new filter blend, comprised of two delicious coffees.

Marlon El Valle

On our quest to find a great small farmer in Guatemala with the help of exporter, Stephany Davila, we met the wonderful Marlon Del Valle and family. They’ve been tending to their outstanding crops for over 25 years.

When the Del Valle family matriarch and legendary pillar of El Valle’s coffee production, María Eugenia passed on ownership of the farm to Marlon, his brother Rudelfi and family, a new generation of coffee farmers was born.

Marlon’s commitment to the community and unique agronomic expertise make this coffee something special. While the Del Valle family used to sell cherries to the local market, Marlon and his brother had a dream of building stronger relationships and exporting their coffee internationally. 

With a lot of effort and great willingness to learn, Marlon Del Valle is now doing so for the very first time. At Rumble, we’re proud to be purchasing all of Marlon’s top-scoring coffee – about half of his total output.

Rwanda Cyarumbo

From 42 smallholder farmers in Rwanda’s Huye District, this 100% Red Bourbon coffee is a testament to collaboration. Grown at high elevations and processed with precision at Cyarumbo washing station, it offers a rich sweetness and juicy acidity.

Cyarumbo washing station, located at 1680 MASL in Rwanda’s Southern Province, services 568 members of the Maraba Cooperative. Farmers in the area benefit from ideal growing conditions, with steady temperatures, ample rainfall, and farms reaching up to 2200 MASL. Under the careful management of Aphrodice Twagirayesu, this station focuses on quality, ensuring only the ripest cherries are selected for processing.

The processing method is meticulous, with cherries sorted by weight, fermented overnight, and hand-sorted twice during drying. Much of the careful hand-sorting is performed by women, ensuring consistency and a high-quality end product. The beans then rest before being dry-milled at the cooperative’s facility, allowing Maraba to oversee every stage of production.

Maraba’s commitment to quality and transparency has transformed the local coffee industry since its establishment in 2001. Cyarumbo, as the first specialty-focused washing station, continues to set a benchmark in Rwanda, with over 300 stations following its lead.