Barista Touch Starbucks Blonde Espresso
Before I begin, I acknowledge that there is some reluctance to buy and use Starbucks beans for making an espresso or latte. But please hear me out. I recently purchased a Breville Barista Touch to stop spending upwards of $35 every month at Starbucks.
But when it comes to making espresso, I’m a compete novice. Since I usually drink a latte at Starbucks, I purchased the Starbucks Blonde Espresso beans. Here are my settings:
Grind size - 14
Grind time - 16s
Brew time - 28s
My input before and after grind is about 18g of coffee, and I get about 46g of espresso. My question is the following:
I use a Mattow tamper and each time I tamp a little harder or reduce the grind size to 10 (or less) while keeping the brewing time constant, my espresso yield is very low. Like 7 or 8g. I wasted almost half of packet of the coffee beans experimenting with grind sizes or tamping. Even a little extra tamping is drastically lowering the espresso yield. Does tamping have such a big impact on brew quantity?
Any ideas on how to pull a nice shot while using the Blonde espresso?