Line a large baking sheet (or two) with parchment paper and preheat oven to 425.
In a large bowl stir together dry ingredients until well combined.
Add in butter. Using a pastry blender or two forks cut the butter into the dry ingredients. Eventually, you'll have a texture that resemble coarse crumbs.
Add buttermilk. Stir the mixture to moisten and create a sticky dough.
Drop a handful of flour onto a clean surface and knead the dough about 10 times.
Roll out the dough or using your hands pat it into a ½" thick round.
Using a 2" biscuit cutter cut out as many rounds as you can. Place on a baking sheet. Gently form scraps into a ball, flatten and cut out more biscuit rounds. Repeat if needed.
Bake biscuits for 12 - 15 minutes. Biscuits shouldn't be too brown! Remove from baking sheet and onto a cooling wrack.
Best when served warm.
Recipe by Carrots & Cake at http://www.carrotsandcake.ca/happy-birthday-carrots-and-cake-poppy-seed-biscuit/