Sift flour and baking soda into a bowl.
In a separate bowl, beat softened butter with brown sugar and white granulated sugar until it’s well blended and becomes a lighter color.
Add vanilla instant pudding and vanilla extract into butter mixture.
Beat in eggs just until combined.
Add flour mixture (from step 1) to the wet batter.
Split the dough into 3 sections.
Mix in matcha to one section and black sesame to another section of dough and knead until uniform in color.
Spiral the 3 sections of dough together to create the marble appearance and roll it out into a cylinder until the diameter is 2-3 inches (Tip: If the dough is becomes sticky to handle, pop it into the freezer for 15-20 min).
Place the marbled dough in freezer and preheat your oven to 350 degrees.
Once your oven is ready, take out your dough and cut your cookies into 1/2 inch slices and place onto a baking tray lined with parchment paper. (*Note: You can also slice and place back into the freezer to bake at a later date for freshly baked cookies! Be sure to bake for 3 additional minutes if baking from frozen.)
Bake for 12-14 minutes or until the vanilla parts get a little golden on the edges.