Getting Started with Your Mr. Coffee Espresso Maker
A Mr. Coffee espresso machine brews strong coffee by forcing hot water through ground coffee under pressure. Unlike drip coffee makers, it uses steam or pump pressure to extract espresso in seconds rather than minutes. The machine has three chambers: a bottom chamber for water, a middle filter basket for ground coffee, and a top chamber for the brewed espresso.
The first time you use it, rinse all removable parts with hot water and run water through the machine without coffee to clear any manufacturing residue. This takes about two minutes and makes the espresso taste cleaner.
Key Takeaways
- Fill the bottom chamber with cold water up to the safety valve, pack finely ground espresso into the filter basket, and screw the top chamber on hand-tight before heating.
- Place the machine on medium heat and listen for a gurgling sound, which signals that water is moving through the coffee and espresso is flowing into the top chamber.
- Remove the machine from heat as soon as you hear a hissing sound, because continuing to heat will burn the espresso and make it taste bitter.
- The entire brewing process takes three to five minutes from when you first place the machine on heat to when you remove it.
- Clean the filter basket and gasket when ready after each use, because dried coffee residue hardens and makes future brews taste stale.
Filling the Water Chamber and Loading Coffee
Unscrew the top chamber from the bottom chamber by turning it counterclockwise. Fill the bottom chamber with cold water up to the safety valve—a small line or hole on the side of the chamber. Do not overfill, because water will spray out during brewing. If you fill past the valve, pour some out.
Insert the filter basket into the group head (the part where the basket screws in). Spoon finely ground espresso into the basket—use espresso-grind coffee, not regular drip coffee, because it is ground much finer. Fill the basket until the coffee is level with the rim, then use the flat bottom of a spoon or a tamper to press the coffee down firmly. The coffee should be packed tight enough that water cannot rush through it.
Screw the top chamber onto the bottom chamber by turning it clockwise. Tighten it by hand until it is snug, but do not use a wrench or force it—hand-tight is correct. If you over-tighten, you risk cracking the glass or ceramic top chamber.
Heating and Brewing on the Stovetop
Place the assembled machine on a burner set to medium heat. Do not use high heat, because it can cause the water to boil too fast and spray out of the safety valve, or crack the top chamber. You will not see anything happen for the first minute or two.
After two to three minutes, you will hear a gurgling or bubbling sound coming from inside the machine. This is the sound of water being forced up through the coffee. At this point, espresso will start flowing into the top chamber. The gurgling will continue as more espresso fills the chamber.
Watch and listen carefully. When the gurgling sound changes to a hissing or sputtering noise, remove the machine from heat when ready. The hissing means the water has mostly left the bottom chamber and steam is now pushing through the coffee. If you leave it on heat after this point, the espresso will burn and taste bitter or scorched.
Pouring and Serving Your Espresso
Let the machine cool for about 30 seconds after you remove it from heat. Unscrew the top chamber carefully—it will be hot. Pour the espresso into your cup. A single-serving brew usually yields one to two ounces of espresso, depending on how much coffee you packed and how fine it was ground.
If you want to make a second cup, empty the used coffee grounds from the filter basket, rinse the basket with hot water, and repeat the process. Do not reuse the same grounds.
Cleaning and Maintenance After Each Use
Clean the machine when ready after brewing, while the parts are still warm. Unscrew the top and bottom chambers. Remove the filter basket and tap the used coffee grounds into the trash. Rinse the filter basket under hot running water until no coffee particles remain.
Look for the rubber gasket—a thin rubber ring that sits inside the group head where the filter basket screws in. Remove it and rinse it as well. Dried coffee on the gasket hardens and prevents a tight seal, which causes water to leak during the next brew or espresso to taste weak.
Rinse the inside of both chambers with hot water. Wipe the outside dry with a cloth. Reassemble the machine loosely (do not screw the top and bottom together tightly) and store it in a dry place. If you live in an area with hard water, run a mixture of equal parts white vinegar and water through the machine once a month to dissolve mineral buildup inside the chambers.
Troubleshooting Common Problems
Espresso comes out too fast and tastes weak: The coffee is ground too coarse or not packed tightly enough. Use espresso-grind coffee (much finer than drip) and press it down firmly with a spoon or tamper. The water should take three to five minutes to push through, not 30 seconds.
Water leaks from the sides during brewing: The rubber gasket is dirty or damaged. Remove it, rinse it thoroughly, and check that it sits flat in the group head. If it is cracked or hardened, it needs to be replaced—gaskets are inexpensive and available online or at kitchen supply stores.
Espresso tastes burnt or bitter: You left the machine on heat too long after the hissing started. Remove it as soon as you hear the hiss. Also check that you are using medium heat, not high heat.
No espresso comes out at all: The coffee is ground too fine or packed too tightly, blocking water flow. Try using slightly coarser espresso grounds or pressing down less firmly. If water still will not flow after two minutes on medium heat, remove the machine and loosen the coffee slightly.
When to Call a Professional
Mr. Coffee espresso machines are straightforward and rarely need repair. However, if the bottom chamber develops a crack or leak, or if the safety valve stops working (water no longer comes out even on high heat), the machine cannot be safely repaired and should be replaced. Do not attempt to weld or patch a cracked chamber.
If you have owned the machine for several years and espresso no longer flows even after cleaning and adjusting the grind, mineral buildup inside the heating chamber may be blocking water flow. Try the vinegar-and-water descaling method described in the cleaning section. If that does not work, the machine has likely reached the end of its life.
Frequently Asked Questions
Can I use regular ground coffee instead of espresso grind?
No. Regular drip coffee is too coarse. Water will rush through it in seconds and you will get weak, watery coffee instead of espresso. Buy espresso-grind coffee, which is ground much finer and designed for pressure brewing.
What if I do not have a tamper to pack the coffee?
Use the flat bottom of a spoon or the back of a measuring spoon. Press down firmly until the coffee is compact and level with the rim of the filter basket. The goal is to create resistance so water cannot flow through too quickly.
Is it safe to leave the machine on the stove unattended?
No. You need to listen for the gurgling-to-hissing transition so you know when to remove it from heat. Leaving it unattended risks burning the espresso or, in rare cases, the safety valve failing and causing hot water to spray out.
How long does the machine last?
A Mr. Coffee espresso maker typically lasts three to five years with regular use and proper cleaning. The rubber gasket may need replacement after a year or two if it hardens or cracks. The machine itself has no moving parts and will not wear out unless the chamber cracks or the safety valve fails.
Can I make more than one cup at a time?
No. The machine brews one serving per cycle. To make two cups, brew once, empty the grounds, refill with fresh coffee and water, and brew again. The entire process takes about ten minutes for two servings.