Bicarbonate of Soda and Baking Powder: What Is the Difference?

Among the most common store-cupboard ingredients, bicarbonate of soda and baking powder are frequently confused. Both are white powders that help mixtures rise, yet their composition, how they work and their proper uses differ, directly affecting the outcome of recipes and household-cleaning tasks.

What is bicarbonate of soda and when does it work best?

Bicarbonate of soda is a simple alkaline compound (NaHCO₃). When it meets an acid, moisture and heat, it releases carbon dioxide (CO₂), creating bubbles that can aerate batters while also helping to tackle dirt, stains and odours.

In cooking, it works most effectively in preparations containing clearly defined acidic ingredients, including yoghurt, honey, molasses, brown sugar or natural cocoa. Used sparingly, it can also make pulses softer or reduce the acidity of certain sauces, provided care is taken to avoid an aftertaste.

What is baking powder and why is it more stable?

Baking powder is a standardised commercially produced blend of bicarbonate of soda, dried food acids, such as phosphates or cream of tartar, and an anti-caking agent. This formula releases CO₂ in controlled stages: some while the mixture is still raw and the rest in the oven, delivering more predictable rising.

Because it is formulated for baking, it gives cakes, cupcakes, muffins, pancakes and quick breads an even texture and a neutral flavour. The packet generally states an average quantity to use, helping to produce reliable results, including at different altitudes, where controlling the rise matters even more.

When should you use bicarbonate of soda or baking powder in cooking?

Choosing between bicarbonate of soda and baking powder depends on whether acidic ingredients are present and on the texture required. Many professional recipes use both: baking powder provides dependable lift, while bicarbonate of soda adjusts acidity and affects the colour and spread of doughs.

In general, their most common uses are:

• Bicarbonate of soda in cookies that spread more, chocolate cakes made with natural cocoa, honey biscuits, or recipes containing yoghurt and kefir.
• Baking powder in plain milk cakes, cornmeal cakes, carrot cakes, muffins, cupcakes and pancakes that require an even rise.
• Fine adjustments: considerably less bicarbonate of soda is normally used than baking powder for the same amount of flour, preventing an alkaline taste and a dense mixture.

How can bicarbonate of soda and baking powder be used for cleaning without waste?

For household cleaning, bicarbonate of soda is the preferred option because it is mildly abrasive, alkaline and fragrance-free. It can neutralise odours in fridges and bins, cut through grease on pans, and supplement washing-up liquid on washable surfaces; always test it first on delicate materials.

Baking powder, meanwhile, is not suitable for cleaning because its acids and starches do not aid cleaning and may leave residue behind. To prevent waste and keep each product effective, use bicarbonate of soda for deodorising and light stain removal, and keep baking powder exclusively for mixtures that need to rise in a controlled way.