Here's the thing about nut brittle:
At its core, it's a very simple thing. You take a handful of readily-available ingredients, bung them into a pan, heat them, and pour them out to cool. You don't even have to cut it. Just crack off slabs of buttery, caramel-y, brittle-y goodness and stuff them into your greedy little pie hole.
So close to easy, and yet so far, far away. Why? Because there is a window within which your brittle will turn that perfect golden color, and have that melting, buttery caramel taste. Before that window, your brittle will be pale and tasteless. Afterwards, even if the color looks right, there will be a distinct taste of burnt. And that window of perfection is very, very small. Trust me.
It took three batches for me to hit the perfect brittle taste, but boy is it worth it. I think this one may be a case of trial and error. You need to KNOW what it looks like when it's right. And if you've never made it before, you may want to steel yourself for getting it there. But stay true...this is some good candy.
A few pointers:
1.) The timing is nearly right about 10 minutes. I found that timing more effective than the candy thermometer in this one.
2.) The batch that came out best was the one where I treated it like caramel: in other words, I didn't stir it. Just the occasional swirl in the pan. Whether that helped or not I don't know, but I do know that it seemed easier to hit the right color when I didn't stir.
3.) I found a great nut mix for this: "Planter's NUTrition (yes, I know...sorry) heart-healthy mix". It has peanuts, almonds, pistachios, pecans, walnuts and hazelnuts. I used a little more than one can (actually a single can would probably be fine). I like the flavor the different nuts give the brittle, and the textures and the colors from the pistachios gave it a festive look. I much preferred the one made with this mix to any of the others, especially the all-peanut one, which was boring.
4.) The batch I made in my enameled cast iron Dutch oven didn't come out as nicely brown as the one I did in the all-clad stainless saucepan.
Festive Nut Brittle2 cups sugar
1/2 cup water
1 stick unsalted butter
1/3 cup light corn syrup
1/2 teaspoon baking soda
12 ounces rosted, salted nuts - peanuts, cashews, pistachios, pecans or any NUTritious combination (sorry, couldn't help it. I went NUTty.)
Fleur de sel or crushed Maldon sea salt
In a large saucepan, combine sugar, water, butter and corn syrup and bring it to a boil. Cook over moderately high heat, stirring occasionally*, until the caramel is light brown and registers 300 on a candy thermometer - 10 minutes. Remove from the heat and carefully stir in the baking soda. The mixture will bubble. Stir in the nuts, then scrape immediately onto a large, rimmed baking sheet sprayed with cooking spray. Using the back of spoon sprayed with cooking spray, spread the brittle into a thin, even layer. Sprinkle with salt. Let cool completely, about 30 minutes. Break the brittle into large, piehole-friendly shards.
*
Note: From my experience, I would not stir, but would give the pan a swirl once or twice.