Fruit Crumble Bars · Raspberry Oat
Raspberry Oat Crumble Bars
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Before you start
Gather your ingredients
Swaps for all-purpose flour
Instead of all-purpose flour
- Gluten-free 1:1 baking flour: The same amount, a blend that includes xanthan gum. A little grittier and more crumbly, browns faster and dries out sooner.
- Bread flour: The same amount. More gluten: chewier cookies and bread, tougher cakes.
- Whole wheat flour: Up to half of the flour. Nuttier, darker and denser.
All 4 swaps for all-purpose flour
Cooking for an allergy? Check every label.
Swaps for rolled oats
Instead of oats
- Quick oats: The same amount. Softer, more cake-like cookies and bars with less chew; mushy in granola and overnight oats.
Swaps for brown sugar
Instead of brown sugar
- White sugar + molasses: 1 cup granulated sugar + 1 tbsp molasses (light) or 2 tbsp (dark). The same as store-bought.
- White sugar: The same amount. Crisper, paler cookies with less caramel flavor.
- Light and dark brown sugar: The same amount, either way. Dark brown sugar tastes stronger and makes bakes a bit darker and moister.
Swaps for baking soda
Instead of baking soda
- Baking powder: 3 tsp baking powder for each 1 tsp baking soda. It rises, but bakes come out paler and puffier, cookies spread less, and the extra powder can taste a little bitter.
Swaps for ground cinnamon
Instead of cinnamon
- Pumpkin pie spice or apple pie spice: The same amount. Mostly cinnamon, with ginger, nutmeg and allspice or cloves: a little spicier.
- Ground allspice or nutmeg: About ¼ the amount. Much stronger and different, but warm in the same way.
Swaps for kosher salt
Instead of salt
- Table salt or fine sea salt: About half as much as Diamond Crystal kosher, about ¾ as much as Morton kosher. The same saltiness when measured this way.
- Salt by weight: 1 tsp is about 6 grams of table salt, 5 grams of Morton kosher, 3 grams of Diamond Crystal kosher. The most reliable way to swap, especially in baking and brines.
Swaps for unsalted butter
Instead of butter
- Salted butter: The same amount, with about ¼ tsp less salt per stick (½ cup) elsewhere in the recipe. Nothing noticeable once you cut the salt.
- Plant-based butter sticks: The same amount. The closest swap.
- Refined coconut oil: The same amount: solid when the butter is soft or cold, melted when it is melted. It is all fat, so bakes are a bit more tender and rich, with no butter flavor.
Cooking for an allergy? Check every label.
Swaps for granulated sugar
Instead of sugar
- Less sugar: Up to ¼ less in cookies, muffins and quick breads. Less browning and spread, a drier, more cake-like texture, and bakes go stale sooner.
- Brown sugar: The same amount, packed. Moister and chewier, with a caramel flavor and darker color.
- Coconut sugar: The same amount. Darker and caramel-like, a little less sweet; cookies spread slightly less.
Swaps for cornstarch
Instead of cornstarch
- All-purpose flour: 2 tbsp flour for each 1 tbsp cornstarch. Sauces turn cloudy instead of glossy and a bit heavier.
- Arrowroot: The same amount. Very clear and glossy; can turn slimy in dairy sauces.
- Potato starch: The same amount. Thickens fast with a clear gloss; don't boil it long.
Cooking for an allergy? Check every label.
Swaps for lemon juice
Instead of lemon juice
- Lime juice: The same amount. A different, more floral aroma; works almost everywhere.
- Bottled lemon juice: The same amount. More sour and flatter; fine in cooking and baking, less bright in dressings and drinks.
- White wine vinegar or white vinegar: Half as much. Sharper, with no citrus aroma.
Step 1 of 11
Heat the oven to 350°F (175°C). an 8x8-inch pan with parchment, leaving overhang on two sides.
Line (how to line a pan)
Line a pan Cover the bottom (and sometimes sides) of a pan with parchment or foil so food doesn't stick and lifts out easily. 1. For a sheet pan, tear parchment the size of the pan and lay it flat.2. For a round cake pan, trace the bottom on parchment, cut the circle out and press it in.3. For brownies and bars, leave two long sides hanging over to make handles (a "sling").4. A little grease under the paper holds it in place. Done when: The paper lies flat with no folds where the batter could run under it. How to line a baking pan with parchment: mistakes to avoid350°F
Step 2 of 11
In a large bowl, stir the flour, oats, brown sugar, baking soda, cinnamon and salt.
Step 3 of 11
Pour in the melted butter and stir until the mixture forms damp, clumpy crumbs.
Step 4 of 11
Scoop out 1 cup of the crumbs and set it aside for the topping.
Step 5 of 11
Press the rest of the crumbs firmly and evenly into the pan with your fingers or the bottom of a measuring cup.
Step 6 of 11
Bake the base until it is just set and lightly golden at the edges.
350°F
Step 7 of 11
Meanwhile, gently toss the raspberries with the sugar, cornstarch and lemon juice in a bowl.
Step 8 of 11
Spread the raspberry mixture over the warm base, then scatter the reserved crumbs on top, squeezing some into small clumps.
Step 9 of 11
Bake until the topping is golden and the filling bubbles thickly around the edges.
350°F
Step 10 of 11
Cool completely in the pan on a rack so the filling sets.
Step 11 of 11
Lift out by the parchment and cut into 16 bars.
All done
Enjoy!
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