Baking soda and baking powder have a lot in common. The two share the same first name, live on the same shelf and hold the same job: hoisting baked goods.
Hot, heavy and dangerous work. And indispensable to the cause of fluffy pancake or tender scone.
Assuming she chooses the right one.
The cook casts her mind back to chemistry, which, with its beaker and formula and apron, held a kitchenlike charm. She recalls that baking soda is nothing but sodium bicarbonate. Alone, it does nothing. Mixed with vinegar or another acidic ally, it bubbles. Which explains why the buttermilk biscuit or sour-cream coffeecake gets its lift from baking soda.
Baking powder also contains sodium bicarbonate, mixed with an acidic kick-start (or two). It can go it alone in cake batter or cookie dough, no need for sour yogurt or tart lemon. Its brawny "double action" means it's laced with two catalysts: one that starts cold, one that kicks in when hot. Battering batter with the old one-two.
The home cook keeps these talents in mind, never presuming that one can sub for the other. She knows that the muffin — like the rest of us — needs many a problem-solving tool. Including the modern approach: collaboration.
Leah Eskin is a Tribune special contributor.
Take a Stroll Scones
Prep: 15 minutes
Bake: 15 minutes
Makes: 8 scones
1 cup plus 2 tablespoons flour
3/4 cup rolled oats
1/4 cup plus 1 tablespoon light brown sugar
1 teaspoon cinnamon
1 teaspoon baking powder
1 teaspoon baking soda
1/4 teaspoon salt
1 stick cold unsalted butter, cut up
1/2 cup dried cranberries (or other dried fruit, chopped)
2 tablespoons roasted, salted pumpkin seeds
3/4 cup whipping cream
1. Mix: Measure flour, oats, 1/4 cup brown sugar, cinnamon, baking powder, baking soda and salt into the food processor. Pulse a few times.
2. Cut: Drop in butter chunks. Pulse several times, cutting butter down to pea-size (or smaller) bits.
3. Fold: Turn out into a large mixing bowl. Fold in dried fruit and seeds. Drizzle on cream a little at a time, folding with a flexible spatula, until dough clumps (you may not need all the cream).
4. Pat: Turn out dough (still a clumpy mess) onto a parchment-lined baking sheet. Pat into a 11/2-inch-thick disk, about 8 inches across. Brush the top with a little of the remaining cream and sprinkle with the remaining 1 tablespoon brown sugar. Slice dough circle into 8 wedges. Separate wedges by 1 inch.
5. Bake: Slide into a 375-degree oven and bake until set and golden, about 15 minutes. Enjoy warm or room temperature.
Provenance: Inspired by the popular Take a Hike Scone at Chicago's Bleeding Heart Bakery. This version drops the orignal's vegan convictions but retains the wholesome outlook.
Rise and shine
Scones (February 27, 2011)