The Sourdough Sidekick is a dedicated appliance designed to simplify one of the most tedious aspects of sourdough baking: starter management. Co-developed by FirstBuild, the innovation hub behind GE Appliances' popular Opal ice maker, and King Arthur Baking Company, the device automates the daily feeding of a sourdough starter, freeing the baker to focus on kneading, shaping, and baking. Priced at $180 and available exclusively in the US, the Sidekick targets those who bake frequently—ideally at least twice a week—since its design quirks make it less practical for occasional use.

How It Works

The device operates with a simple premise: you add a small amount of existing starter (15 grams, about a tablespoon) into a glass crock, fill two dispensers with flour and water, and set a schedule. In its Auto mode, the Sidekick dynamically calculates feeding times based on your target bake date, the amount of starter needed, and local ambient temperature. It then slowly dispenses flour and water, mixing the starter at two-hour intervals, so the starter peaks exactly when you plan to bake. The process mimics the traditional feeding cycle but removes the need for manual measurement and timing.

During testing, a standard white bread flour yielded excellent results. After setting a bake date a few days in advance, the Sidekick produced a strong, active starter that resulted in a well-risen loaf—possibly even overproofed, suggesting the machine's starter was more vigorous than a manually maintained one. The device can handle various flours, including whole wheat and rye, but switching requires recalibration to account for different densities. A coarse rye flour proved problematic: the starter became too thick for the paddle to mix properly, leading to dry clumps and uneven hydration. This forced a switch to Custom mode, which allows manual adjustment of flour and water ratios to create a looser starter.

Modes and Flexibility

The Sidekick offers three operating modes: Auto, Ratio, and Custom. Auto mode is the most convenient but has limitations. It requires exactly 15 grams of starter to begin and imposes a minimum starter output that scales with time. For a bake set four days out, it insists on producing at least 400 grams—far more than most single-loaf recipes need—resulting in significant discard (unused starter). There is no maintenance mode; you must always set a bake date within a week. For bakers who want to keep a starter alive without immediate plans, the only options are to set an arbitrary date or store the crock in the fridge.

Ratio mode allows selecting preset starter-to-flour-to-water ratios and adjusting feeding frequency, but it cannot vary the thickness of the starter—all feeding must use equal parts flour and water. Custom mode is the most flexible: it lets the user define seed amount, feeding frequency, and exact quantities of flour and water. This enabled successful feeding of the coarse rye starter and can be used to create a custom maintenance schedule with micro-feedings. FirstBuild even provides instructions for starting a new starter from scratch in four days using Custom mode. However, unlike Auto mode, Ratio and Custom modes do not factor in ambient temperature, so the baker must monitor the starter's activity manually.

Smart Features and Cleaning

Despite having Wi-Fi and a companion app, the Sidekick is not a sophisticated smart home device. The app can send notifications when the starter is ready or when discard needs to be removed, but the built-in screen provides the same information. The app cannot change settings; it merely shows current configurations. Most users will ignore it entirely.

Cleaning is a notable drawback. FirstBuild recommends washing the glass crock, lid, and paddle after every feeding cycle to prevent buildup. These core parts are not dishwasher-safe, requiring hand washing. The water tank and flour hopper can be cleaned in the dishwasher, but only periodically. The stirring mechanism operates every two hours with a loud 30-second whirring sound. In a small kitchen or studio apartment, this noise could become annoying. The device's single-purpose nature also demands dedicated counter space, which may be hard to justify for anyone not baking multiple times per week.

Performance and Verdict

The Sourdough Sidekick excels at what it does: automating the repetitive feeding of a sourdough starter. For a dedicated baker who produces at least two loaves per week, the convenience could outweigh the $180 price tag and the counter footprint. The starter it produced was consistently healthy, and the ability to set a bake date and walk away is genuinely appealing. However, the limitations—minimum starter output, lack of a pure maintenance mode, noise, and hand-washing requirements—make it a poor fit for casual bakers or those with limited space.

In testing, the device performed well with standard flours but struggled with coarser varieties without manual intervention. The Auto mode's insistence on producing extra discard grated, especially for those who dislike waste. Custom mode offers workarounds but requires more attention, somewhat defeating the purpose of automation. The app added little value, and the noise was a persistent annoyance.

Ultimately, the Sourdough Sidekick is a niche tool for a specific audience: ardent sourdough enthusiasts who bake often, have ample counter space, and can tolerate the drawbacks. For everyone else, a simple jar and a morning feeding routine remain more practical and cost-effective. The device succeeds in its core mission but fails to cater to the occasional baker, leaving the sourdough community with a product that is both innovative and frustratingly limited.

Source: The Verge News