It does look a bit bare to me. No cushion--the sill is too shallow and no one could sit there. I'd add curtain panels on rings and rods to soften the area. Mount the hardware almost to the ceiling to visually raise the window. You probably can use one curtain width on each side, and have them stacked back past the glass opening. Then replace the metal blinds with white honeycomb shades--they are more attractive and softer than blinds and they'll serve the same purpose. (Unless you are a VERY exuberant cook, curtains wouldn't necessarily be a problem in a kitchen.)

The patterned balloon shades are very pretty but you'd need to replace the blinds to mount the balloon shades inside the frame. And if you replaced the blinds with fabric shades as above, they may make the room dark.

Here's an example of curtain panels on a window with a fairly deep sill similar to yours. Notice the way the curtains hung high and wide of the glass visually extend the window without blocking any of the light coming in.

Sims Hilditch, Dorset Manor House · More Info

And another:

Darien Home · More Info