Measure the spices by weight and roast them separately on warm griddle for couple of minute.
Take care not to burn the spices. Keep tossing them.
Hand pound them on a mortar and pestle or use your coffee grinder or spice grinder to make a smooth powder.
Pulse them till you get the desired fineness of the spice blend.
Recipe Notes
This is Bengali version of Garam masala. There exist other blends too like shahi garam masala, kashmiri garam masala or punjabi garam masala. This blend of garam masala is highly overpowering, so use it in few pinches as requires. Bengali garam masala can be used in both veg and non veg dishes. The proportion of the spice blend is important.