Correct and Incorrect Brewing Methods for Drip Coffee Bags - Why Drip Coffee Bags Should Not Be Brewed Directly

Introduction

Drip bag coffee is where a lot of beginners first step into the world of single-origin coffee. There is no complicated gear to master, and the process is far more forgiving than a full pour-over. With nothing more than one drip bag, a kettle of hot water, and a cup, you can brew a fragrant, full-bodied cup of single-origin coffee.

What Is Drip Bag Coffee?

The idea behind drip bag coffee grew out of the hanging string tea bag, and it was originally called "one-cup extraction coffee." Coffee grounds, however, cannot simply be steeped in water the way tea leaves can, so the inventor cleverly mimicked a filter-cup pour-over by suspending a non-woven filter bag full of coffee in the middle of a cup.

After repeated refinement, two fold-out paper tabs were added to either side of the filter bag. When pulled open, they let the bag hang suspended in the center of the cup. Because the tabs hook over the rim like two little ears, people affectionately named it "drip bag coffee."

Wrong Ways to Brew Drip Bag Coffee

Mistake 1: Treating It Like Instant Coffee

Drip bag coffee is not instant coffee. Drip bag coffee is not instant coffee. Drip bag coffee is not instant coffee! Instant coffee is made by drying brewed coffee liquid into a powder, which is why hot water can bring a cup back to life instantly.

FrontStreet Coffee makes its drip bags by grinding fresh coffee beans straight to a medium-fine consistency. Only about 30% of the flavor compounds in those grounds are water-soluble; the other 70% are insoluble woody fibers, also known as spent grounds. So if you tear open a drip bag and tip the grounds directly into a cup, you will not get a clean cup of black coffee, you will get a mouthful of grit.

Mistake 2: Steeping It Like a Tea Bag

A drip bag is not a tea bag, and you cannot simply soak it in water to extract the coffee. The grounds inside are ground relatively fine, and each bag holds about 10 grams. When the bag hangs in the cup, the grounds settle into the center and form a fairly thick bed.

If you never open the seal to pour water into the center of the bed, and instead just run water over the surface of the bag, the middle of that thick bed stays dry, or takes a very long time to wet through. Meanwhile, the grounds closest to the filter release their flavor and then start giving off woody notes. Because not all the grounds actually take part in the extraction, you end up with a flavorless coffee water carrying woody, papery notes, since the hot water also steeps the paper tabs.

Mistake 3: Pouring All the Water at Once

Many people brew drip bag coffee with a regular kettle. Because the spout is wide, it is easy to flood the filter bag in one go, which pushes grounds over the rim and into the cup. The result is a noticeably muddier, less pleasant drink.

Mistake 4: Using a Container That Is Too Small or Too Short

FrontStreet Coffee recommends adding 150g of hot water to one 10g drip bag, which yields about 140-145g of coffee. If the container is too small or too short, the coffee level keeps soaking the bottom of the bag as it brews. The grounds sitting at the bottom are extracted over and over, which easily turns the cup bitter.

The Right Way to Brew Drip Bag Coffee

Do This 1: Choose a Taller Brewing Vessel

Pick a taller cup or pot for brewing, so that a clear gap remains between the drip bag and the surface of the brewed coffee.

Do This 2: Keep the Water Temperature Between 88°C and 92°C

Soluble flavor molecules in medium-fine grounds need the right temperature to open up. FrontStreet Coffee suggests 90°C-92°C for light-to-medium roast drip bags with floral, berry, and citrus notes; 89°C-90°C for medium roast drip bags with nutty and cocoa notes; and 88°C-89°C for medium-dark roast drip bags with herbal, spice, and dark chocolate notes.

Do This 3: Pour the Hot Water in Small Amounts, Several Times

A small pour-over kettle is ideal here, since it lets you control the flow and wet the grounds evenly for an even extraction. If you do not have one, it is fine to simply pour in small amounts several times rather than filling the bag all at once.

Do This 4: Brew at a 1:15 Ratio

FrontStreet Coffee recommends a 1:15 brew ratio for drip bag coffee. Since FrontStreet Coffee's drip bags hold 10g each, a 1:15 ratio means adding 150g of hot water.

FrontStreet Coffee Recommendation

If you are looking for drip bags that carry the classic Yirgacheffe profile, FrontStreet Ethiopia Yirgacheffe Gedingding is an easy starting point. Washed and gently processed, it delivers the signature white floral lift, bright citrus and berry notes, and a green-tea-like sweetness that makes a drip-bag cup taste clean rather than heavy.

For something sweeter and more fruit-forward, consider FrontStreet Ethiopia Huakui. Its tropical aromatics read as strawberry, passion fruit, jackfruit, and even lychee, with low bitterness and a juicy, smooth body that works especially well when brewed a little cooler, exactly the range this guide recommends for a balanced drip-bag cup.