Line an 8x8in square pan with a piece of parchment paper and set aside.
Melt the Biscoff butter a small bowl in the microwave for 10 to 20 seconds until the butter is a liquid consistency. Pour the Biscoff butter into the prepared pan and then allow the Biscoff butter to freeze.
In heatproof bowl melt the butter and chocolate.
In a stand mixer or a large mixing bowl with a hand mixer add in the eggs and both sugars. Beat this mixture until it's light and fluffy. Add in the melted butter chocolate mixture and mix until there are no longer any streaks.
Sift the flour, cocoa powder, espresso powder, baking powder, salt over the brownie batter and mix until there are no more dry clumps.
Take out the frozen Biscoff layer and line your brownie pan again. Add in half your brownie batter spread to the edge of the pan and then add in the Biscoff layer. Top with the remaining brownie batter and then place Biscoff cookies on top of the brownie batter.
Bake brownies for 15 minutes and then place a sheet of aluminum foil over the brownies to prevent having overly crunchy lotus cookies. Brownies are finished baking after a toothpick is inserted in and the batter on the toothpick is no longer wet, but it has moist crumbs on the toothpick.
Remove brownies from oven and cool on a rack before cutting and serving.
Store leftovers well wrapped with plastic wrap or in an airtight container at room temp for 4-5 days.