Pre-heat oven to 350 degrees F. Line baking sheet with parchment. Set aside.
In a medium bowl, combine flour, cocoa powder, baking soda, salt, espresso powder, and tea leaves together.
In a standing mixer or using a hand mixer on medium speed, beat butter, sugar, brown sugar, vanilla extract, and eggs together.
In 2-3 batches, combine flour into wet mixture.
Fold half the chocolate into the mixture.
Roll into 1 1/2 inch balls, flatten the top 1/4 of the way down and gently press chocolate chunks into each cookie. 6 or 8 to a sheet depending on the size of your ball. I like these giant so I make them bigger.
Bake 9-10 minutes for giant cookies, 8-9 minutes for smaller cookies.
Remove pan from oven, allow cookies to set on baking sheet for 1 minute. The residual heat continues to bake the center.
Repeat until all dough is gone.
Store in a zip-lock or airtight container. If freezing, let cool completely and wrap in plastic wrap, then store in a zip-lock or airtight container.