Chewy Blondies

A blondie is a chewy baked bar built on brown sugar and butter instead of chocolate. The flavour people describe as butterscotch or caramel comes from the molasses in brown sugar cooked with butter, not from any added butterscotch. It is served cut into squares from a pan like a brownie, which is where the confusion between the two comes from.

They are not the same batter with the cocoa swapped out, which is the usual assumption. A brownie is built around chocolate, so it uses granulated sugar and gets its structure and flavour from cocoa and melted chocolate. A blondie has no chocolate in the base at all, and uses brown sugar as both the sweetener and the flavour. Swap the cocoa out of a brownie recipe and you get a dry, pale bar, not a blondie.

Air, almost always. The two ways it gets in are creaming the butter instead of melting it, and using baking soda instead of baking powder. This recipe avoids both. The third cause is beating the batter after the flour goes in, which builds gluten and pushes the crumb toward bread. Fold only until the flour disappears and then stop.

Usually they were cut warm. Butter is liquid at baking temperature and sets as the bars cool, so a blondie cut too early leaves grease on the knife and feels oily. Give them the full 90 minutes. Genuinely greasy cooled blondies point elsewhere: butter that was still hot when it met the sugar, which stops the two combining properly.

Use three cues rather than the clock. The top should be set and lightly crinkled all over, the edges golden and just pulling away from the pan, and a skewer in the middle should come out with a few moist crumbs on it. The centre still looking slightly underdone is correct, because the hot pan keeps cooking them for a few minutes after they come out.

You can, with an adjustment. Glass heats slowly and then holds that heat, so it keeps baking the edges after the pan leaves the oven and tends to leave them dry and hard. If glass is what you have, drop the oven to 325 F, start checking at 22 minutes, and take the pan out at the earlier end of the doneness cues. Metal is the better tool for a bar this thin.

Yes, and it is the most common addition. Fold in 3/4 cup and hold back a tablespoon to press into the surface, since chips added to a thick batter tend to settle. Worth being clear though: chocolate chip blondies are a variation. The plain version above is what the word blondie actually describes, and it is also what keeps the cost at 14 cents a bar.

Yes, one for one. Dark brown sugar has roughly twice the molasses, so the bars come out darker with a deeper, almost toffee-like flavour. Light brown is the default here because it lets the butter come through rather than burying it, but neither is wrong.

Because the butter has not set yet. A warm blondie is structurally still a soft batter held together by heat, so the knife drags and tears it instead of cutting, and the centre reads greasy on the tongue. Ninety minutes on a rack is the difference between clean squares and a pan you serve with a spoon.

Because of the sugar. The shiny paper-thin crust on a brownie is dissolved granulated sugar that rises to the surface and dries there, and this recipe uses only brown sugar, which carries enough extra moisture that the surface never dries out that way. A blondie top should be matte and lightly crinkled instead. Adding white sugar to chase the shine would cost you the butterscotch flavour that makes it a blondie.

Yes, for up to 3 months. Freeze them cut, layered with parchment in an airtight container, and thaw at room temperature for about an hour. Nothing in the recipe separates or weeps on thawing, so unlike a custard or gelatin dessert they come back very close to how they went in.

Four days in an airtight container at room temperature, best on the first two. They firm up over time as the sugar recrystallises rather than going stale in the usual sense. A slice of sandwich bread in the container slows it down, and eight seconds in the microwave undoes most of it.